Ford - Auto Specialties Performance - Quality Performance Products

What do Underdrive Pulleys do? Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air compressor rob horsepower from the engine. By replacing factory-sized crank and accessory drive pulleys with a resized pulley, the accessories are slowed, resulting in more horsepower available to the drive wheels. Typically, a set of Auto Specialties street pulleys will increase horsepower by 12-15, and increase mileage by 2 to 3 MPG. All pulleys are manufactured from Billet Steel or Aluminum, exceeding factory quality.

79-93
Underdrive Kit w/grooved WP
829125 ODG

79-93
Cobra WP

Year	Engine	Pulley Description	Full Charge	Info	Image	Nitride	Hard Coat Black Alum	Hard Coat Blue Alum	Hard Coat Red Alum	Hard Coat Clear Alum
05-07	4.6 L GT	25% HarmonicDampner 8% up 90	–	–		ASP527305 $245.00	–	–	–	–
01-04	4.6 GT	25% HarmonicDampner 26% Water Pump 8% Alternator	950 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. Loosen water pump bolts and alternator nut. An impact with swivel will be required to loosen alternator nut. 2. Remove belt. Tensioner is accessible from under car. CAUTION: Insure car is properly secured on jack stands before accessing underside of car. 3. With transmission in first gear and emergency brake applied, remove harmonic balancer bolt. An impact wrench will be required with automatic transmission. Remove harmonic balancer using a 3 prong balancer remover. Remove water pump and alternator pulleys. 4. Apply high temperature silicone sealer to underdrive harmonic balancer keyway. Install harmonic balancer onto shaft. Use 12mm x 60mm bolt to engage harmonic balancer on shaft only far enough to engage factory bolt then remove. CAUTION: Do not tighten 12mm x 60mm bolt as damage to threads may occur. Torque factory bolt as follows: 1.) Torque to 75 lb/ft. 2.) Back out 1 turn 3.) Torque to 45 lb/ft and then tighten as additional 1/4 turn. 5. Install new water pump, alternator pulley and factory belt. Insure belt is seated properly in all pulleys. Tighten water pump bolts and alternator nut. A 1/2″ drive impact with 70-80 psi is required to tighten alternator nut. 6. Start engine. Inspect all pulleys to insure no wobble and that belt is properly installed.	–	ASP522328 $244.95	–	–	–	–
99-01	4.6 Cobra	25% HarmonicDampner 26% Water Pump 10% Alternator	950 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. Loosen water pump bolts and alternator nut. An impact with swivel will be required to loosen alternator nut. 2. Remove belt. Tensioner is accessible from under car. CAUTION: Insure car is properly secured on jack stands before accessing underside of car. 3. With transmission in first gear and emergency brake applied, remove harmonic balancer bolt. An impact wrench will be required with automatic transmission. Remove harmonic balancer using a 3 prong balancer remover. Remove water pump and alternator pulleys. 4. Apply high temperature silicone sealer to underdrive harmonic balancer keyway. Install harmonic balancer onto shaft. Use 12mm x 60mm bolt to engage harmonic balancer on shaft only far enough to engage factory bolt then remove. CAUTION: Do not tighten 12mm x 60mm bolt as damage to threads may occur. Torque factory bolt as follows: 1.) Torque to 75 lb/ft. 2.) Back out 1 turn 3.) Torque to 45 lb/ft and then tighten as additional 1/4 turn. 5. Install new water pump, alternator pulley and factory belt. Insure belt is seated properly in all pulleys. Tighten water pump bolts and alternator nut. A 1/2″ drive impact with 70-80 psi is required to tighten alternator nut. 6. Start engine. Inspect all pulleys to insure no wobble and that belt is properly installed.		ASP522375 $244.95	–	–	–	–
96-00	4.6 GT	25% HarmonicDampner 26% Water Pump 8% Alternator	950 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. Loosen water pump bolts and alternator nut. An impact with swivel will be required to loosen alternator nut. 2. Remove belt. Tensioner is accessible from under car. CAUTION: Insure car is properly secured on jack stands before accessing underside of car. 3. With transmission in first gear and emergency brake applied, remove harmonic balancer bolt. An impact wrench will be required with automatic transmission. Remove harmonic balancer using a 3 prong balancer remover. Remove water pump and alternator pulleys. 4. Apply high temperature silicone sealer to underdrive harmonic balancer keyway. Install harmonic balancer onto shaft. Use 12mm x 60mm bolt to engage harmonic balancer on shaft only far enough to engage factory bolt then remove. CAUTION: Do not tighten 12mm x 60mm bolt as damage to threads may occur. Torque factory bolt as follows: 1.) Torque to 75 lb/ft. 2.) Back out 1 turn 3.) Torque to 45 lb/ft and then tighten as additional 1/4 turn. 5. Install new water pump, alternator pulley and factory belt. Insure belt is seated properly in all pulleys. Tighten water pump bolts and alternator nut. A 1/2″ drive impact with 70-80 psi is required to tighten alternator nut. 6. Start engine. Inspect all pulleys to insure no wobble and that belt is properly installed.	–	ASP527328 $238.95	–	–	–	–
96-00	4.6 Cobra	25% HarmonicDampner 26% Water Pump 10% Alternator	950 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. Loosen water pump bolts and alternator nut. An impact with swivel will be required to loosen alternator nut. 2. Remove belt. Tensioner is accessible from under car. CAUTION: Insure car is properly secured on jack stands before accessing underside of car. 3. With transmission in first gear and emergency brake applied, remove harmonic balancer bolt. An impact wrench will be required with automatic transmission. Remove harmonic balancer using a 3 prong balancer remover. Remove water pump and alternator pulleys. 4. Apply high temperature silicone sealer to underdrive harmonic balancer keyway. Install harmonic balancer onto shaft. Use 12mm x 60mm bolt to engage harmonic balancer on shaft only far enough to engage factory bolt then remove. CAUTION: Do not tighten 12mm x 60mm bolt as damage to threads may occur. Torque factory bolt as follows: 1.) Torque to 75 lb/ft. 2.) Back out 1 turn 3.) Torque to 45 lb/ft and then tighten as additional 1/4 turn. 5. Install new water pump, alternator pulley and factory belt. Insure belt is seated properly in all pulleys. Tighten water pump bolts and alternator nut. A 1/2″ drive impact with 70-80 psi is required to tighten alternator nut. 6. Start engine. Inspect all pulleys to insure no wobble and that belt is properly installed.		ASP527375 $238.95	–	–	–	–
96-00	4.6 GT	25% Alum Spacer 26% Water Pump 8% Alternator	950 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Loosen water pump pulley bolts and alternator nut. An impact with swivel will be required to loosen alternator nut. 2. Remove belt. Tensioner is accessible from under car. CAUTION: Insure car is properly secured on jack stands before accessing enderside of car. 3. With transmission in first gear and emergency brake applied, remove harmonic balancer bolt. An impact wrench will be required with automatic transmission. Remove harmonic balancer using a 3 prong balancer remover. Remove water pump pulley and alternator pulleys. 4. Install hub of factory harmonic balancer into counter bore of underdrive. Align threaded holes. Keyway orientation not required. 5. Install and hand tighten (3) 1/4″ x 1.25″ bolts. On 99 GT install (3) 5/16-18 x 1.25″ bolts. The 99 GT uses the larger outside bolt pattern on new crank pulley. Factory harmonic balancer does not fully shoulder in underdrive at this point. This insures proper alignment of bolt holes after installation. 6. Apply high temperature silicone sealer to underdrive crank pulley keyway. Install harmonic balancer onto shaft. Torque 12mm x 80mm bolt as follows: 1.) Torque to 75lb/ft. 2.) Back out 1 turn 3.) Torque to 45lb/ft and then tighten an additional 1/4 turn. 7. Remove (3) small bolts and apply Loctite #242 thread lock to threads. Reinstall and torque evenly to 10-12 ft/lbs. 8. Install new water pump pulley, alternator pulley and factory belt. Insure belt is seat properly in all pulleys. Tighten water pump pulley bolts and alternator nut. A 1/2″ drive impact with 70-80 psi is required to tighten alternator nut. Insure factory harmonic balancer does not rub on smog pump hose. 9. Start engine. Inspect all pulleys to insure no wobble and that belt is properly installed.	–	ASP527728 $136.50	–	–	–	–
96-97	4.6 Cobra	25% Alum Spacer 26% Water Pump 8% Alternator	950 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Loosen water pump pulley bolts and alternator nut. An impact with swivel will be required to loosen alternator nut. 2. Remove belt. Tensioner is accessible from under car. CAUTION: Insure car is properly secured on jack stands before accessing enderside of car. 3. With transmission in first gear and emergency brake applied, remove harmonic balancer bolt. An impact wrench will be required with automatic transmission. Remove harmonic balancer using a 3 prong balancer remover. Remove water pump pulley and alternator pulleys. 4. Install hub of factory harmonic balancer into counter bore of underdrive. Align threaded holes. Keyway orientation not required. 5. Install and hand tighten (3) 1/4″ x 1.25″ bolts. On 99 GT install (3) 5/16-18 x 1.25″ bolts. The 99 GT uses the larger outside bolt pattern on new crank pulley. Factory harmonic balancer does not fully shoulder in underdrive at this point. This insures proper alignment of bolt holes after installation. 6. Apply high temperature silicone sealer to underdrive crank pulley keyway. Install harmonic balancer onto shaft. Torque 12mm x 80mm bolt as follows: 1.) Torque to 75lb/ft. 2.) Back out 1 turn 3.) Torque to 45lb/ft and then tighten an additional 1/4 turn. 7. Remove (3) small bolts and apply Loctite #242 thread lock to threads. Reinstall and torque evenly to 10-12 ft/lbs. 8. Install new water pump pulley, alternator pulley and factory belt. Insure belt is seat properly in all pulleys. Tighten water pump pulley bolts and alternator nut. A 1/2″ drive impact with 70-80 psi is required to tighten alternator nut. Insure factory harmonic balancer does not rub on smog pump hose. 9. Start engine. Inspect all pulleys to insure no wobble and that belt is properly installed.		ASP527775 $136.50	–	–	–	–
94-95	5.0	26% Crank	750 RPM	–	–	ASP523500 $65.00	ASP823500* $65.00	–	–	–
94-95	5.0	26% Crank 30% Water Pump 2 3/4″ Alternator	950 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Loosen alternator nut with impact socket and swivel. Loosen four water pump and crank pulley bolts, remove belt. 2. Remove factory pulleys and install underdrive pulleys. Install crank pulley with shallow side against harmonic balancer. 3. Reinstall factory belt. On 5.0 Cobra Mustang, remove and bypass factory idler pulley in order to retain factory belt. Tighten all bolts and alternator nut. (Use Loctite thread Loc #242 or equivalent to secure bolts.) 4. Insure tensioner mark is within the limit marks. Turn on vehicle and inspect pulleys for any wobbles and that belt is properly seated in pulleys.		ASP525928 $125.00	ASP825928* $139.00	–	–	–
79-93	5.0	25% Crank	850 RPM	AUTO SPECIALTIES 520100, 620100, 820100, 822100, 824100 & 829100 Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Remove existing belt and craftshaft pulley 2. Install new pulley with internal hex bolts supplied. Tighten hex bolts evenly. Use Loclite #242 (or equivalent) on threads. 3. If ASP Bracket (020400)is not used, install new belt. Belts are readily available at most parts stores. Belts are as followed: 5.0 Mustang 87-93 Gates Belt K060888 83-84 Gates Belt K060895 85-86 Gates Belt K060900 81-82 Gates Belt K060905 85-86 (Auto) Dayco 5060885 79-80 Gates Belt K060915 5.0/5.8 Trucks 87 302 Gates Belt K060860 88-92 351 Gates Belt K060900 88-92 302 Gates Belt K060876 93-97 Gates Belt K060990 93-96 302 Gates Belt K060956 4. We recommend warm idle speed for automatic cars set at 650-700 RPM in drive. Standard shift 700-750 RPM.	–	ASP520100 $67.00	ASP820100* $68.00	–	–	–
85-86	5.0S/Tran	25% Crank 2 3/4″ Alternator	1100 RPM	–	–	ASP520105 $112.00	ASP820105* $89.95	–	–	–
79-93	5.0	25% Crank 15% Water Pump	850 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. PRE-INSTALLATION CHECK LIST: 1. INSURE RADIATOR DOES NOT HAVE AN OVER ABUNDANCE OF SOLIDFICATION OR SLUDGE. (DRAIN RADIATOR SUFFICIENTLY TO VIEW COOLANT TUBES.) CLEAN IF REQUIRED. CHECK FOR BENT OR BLOCKED EVAPORATOR FINS. 2. REPLACE THERMOSTAT IF MORE THAN 3 YEARS OLD. 3. TEST FAN DRIVE CLUTCH: SPIN THE FAN BLADE. A MODERATE RESISTANCE SHOULD BE FELT. IF THERE IS NO RESISTANCE OR A VERY HIGH RESISTANCE, THE MINIMUM AND MAXIMUM FAN SPEEDS MUST BE CHECKED PER FACTORY SPECIFICATIONS. INSTRUCTIONS FOR THE THREE PULLEY SYSTEM: 1. LOOSEN ALTERNATOR NUT, WATER PUMP AND CRANK PULLEY BOLTS WHILE BELT IS STILL IN TENSION. NOTE: AN IMPACT SWIVEL IS REQUIRED TO REMOVE ALT. NUT. 2. REMOVE BELT. 3. BOLTS AND THREE FACTORY PULLEYS CAN NOW BE EASILY REMOVED. PLACE FAN CLUTCH CAREFULLY AGAINST RADIATOR WHILE REMOVING WATER PUMP PULLEY. 4. INSTALL NEW PULLEYS WITH BOLTS, HAND TIGHT AT THIS POINT. (SOCKET HEAD BOLTS ARE SUPPLIED FOR CRANK PULLEY.) INSTALL BELT. TORQUE ALL BOLTS PER FACTORY SPECS. (USE OF LOCTITE THREAD LOCK IS RECOMMENDED ON ALL THREADS.) 5. CHECK THAT BELT IS PROPERLY SEATED IN ALL PULLEYS. INSURE TENSIONER ARROW IS WITHIN THE INDICATOR MARKS ON TENSIONER. IF ADJUSTMENT IS REQUIRED, RELAX TENSIONER FROM BELT, LOOSEN UPPER 9/16 HEX ALTERNATOR ANCHOR BOLT, SHIFT ALT. TOWARDS AIR CLEANER OR ALLOW IT TO MOVE IN AS REQUIRED WITHIN THE CLEARANCE OF THE DIAMETERS. TIGHTEN WHILE HOLDING ALTERNATOR. IF ADDITIONAL ADJUSTMENT IS REQUIRED, REMOVE BELT, LOOSEN 3/4″ HEX NUT ON TENSIONER. PUSH DOWN ON TENSIONER PULLEY TO SHORTEN MOVEMENT, PULL UP TO LENGHTEN. TIGHTEN 3/4″ NUT WHILE HOLDING TENSIONER PULLEY. IF NEW BELT IS DESIRED, INSTALL GATES BELT K060900 FOR 85-93 5.0 MUSTANG WITH A/C. 6. SET WARM IDLE SPEED FOR AUTOMATIC CARS AT 650-700 RPM IN DRIVE. STANDARD SHIFT AT 750-800 RPM. INSTRUCTIONS FOR CRANK & WATER PUMP PULLEYS ONLY: FOLLOW ABOVE INSTRUCTIONS, EXCEPT THE REMOVAL OF ALTERNATOR PULLEY IS NOT REQUIRED. INSTALL GATES BELT K060895. FOR TRUCK APPLICATIONS SEE BELT NUMBERS LISTED BELOW. INSTRUCTIONS FOR CRANK & ALTERNATOR ONLY: (RECOMMENDED FOR 85 & 86 5.0 MUSTANG W/STANDARD TRANSMISSION) FOLLOW INSTRUCTIONS FOR INSTALLING 3 PULLEY SYSTEM, EXCEPT THE REMOVAL OF THE WATER PUMP PULLEY IS NOT REQUIRED. INSTALL GATES BELT K060900. GENERAL RECOMMENDATIONS: 1. WITH PART NO. 820126 & 520126, A REDUCTION IN CHARGING AT THE LOWER RPM’S IS NORMAL. IT IS BEST TO DRIVE IN A GEAR SUFFICIENT TO MAINTAIN APPROXIMATELY 1500 RPM’S OR GREATER IN ORDER TO MAINTAIN A GOOD CHARGE IN THE BATTERY. 2. AVOID PROLONGED IDLE ESPECIALLY IN HOT WEATHER OR WITH AC OR HEADLIGHTS IN USE. TRUCK BELT LENGTH: 87 5.0 : GATES K060875 88-92 5.0 : GATES K060885 93-96 5.0 : GATES K060970 88-92 5.0 : GATES K060915 93-97 5.8 : GATES K061000	–	ASP520120 $125.00	ASP820120* $106.00	–	–	–
79-93	5.0	25% Crank 15% Water Pump 1 7/8″ Alternator	700 RPM	–	–	ASP520124 $135.00	–	–	–	–
79-93	5.0	25% Crank 15% Water Pump 2 1/2″ Alternator	950 RPM	–		ASP520125 $135.00	ASP820125 $135.95	ASP829125 $135.95	ASP822125 $135.95	ASP824125 $135.95
79-93	5.0	25% Crank 15% Water Pump 2 3/4″ Alternator	1100 RPM	–	–	ASP520128 $135.00	ASP820128 $135.95	ASP829128 $114.95	ASP822128 $114.95	ASP824128 $114.95
79-93	5.0	25% Crank 15% Water Pump 3 1/2″ Alternator	1500 RPM	–	–	–	ASP820126* $184.95	–	–	–
2001	4.6 GT	26% Water Pump Pulley Short water pump	950 RPM	–	–	ASP520123 $85.00	–	–	–	–
79-93	5.0	Cobra WP Pulley	–	–		ASP520141 $75.00	–	–	–	–

Mustang V6

Above images in order from left to right; 1999-00 3.8L V6 stock dampner / new stock dampner with factory pulley removed / new 25% reduction crank pulley and new harmonic dampner
All ASP 25% Underdrive Street System Harmonic Dampner Design add 10+ Rear wheel HP.
Part# ASP820117 & ASP820122 *

1994-98 3.8 L Ford Mustang Crank Pulley

25% Reduction Crank and Alternator Pulley Kit,
This pulley kit will give you 9+ Rear wheel HP.
Part# ASP826308

Year	Engine	Pulley Description	Full Charge	Info	Image	Nitride	Zinc	Hard Coat Black Alum
2011	3.7L	25% dampner	850RPM	–	–	ASP520144** Call	–	–
05-10	4.0L	25% dampner	850 RPM	–	–	ASP526400 $285.00	–	–
01-04	3.8/3.9	25% Dampner Crank Pulley	950 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. You are receiving two parts, but removing one. A new balancer pulley and underdrive pulley. 1. Remove water bottle and fan. 2. Remove crank bolt. 3. Remove belt. 4. Use pulley puller (harmonic balancer puller) to remove crank. 5. Place grease on outside and inside of new balancer snout. 6. Install new balancer without the new pulley. Use balancer to push new balancer on. 7. Apply Loctite Thred Lock #242 or equivalent to threads on bolt. Tighten to 80ft. lbs. 8. Apply Loctite Thread Lock #242 or equivalent to 8mm bolts to hold on new crank pulley that will attach to the harmonic balancer. 9. Bolt to harmonic balancer, torque to 45 ft./lbs. or hand tight. 10. Reinstall fan, water bottle and install new Gates belt K060966. 11. Inspect belt to make sure it is properly seated in all pulley grooves. Turn on vehicle and check to make sure pulley installation does not wobble. When removing the stock harmonic balancer and putting on the new harmonic balancer, look to see if the new hamonic balancer matches the stock harmonic balancer. Some of the 99-00 3.8 have the balancer for the 2001 on them and vice versa. If you find that the new harmonic balancer does not match the stock balancer you will have to get it exchanged for the correct one. 99-00 3.8 Mustang Balancer 2001 3.8 Mustang Balancer	–	–	–	ASP820122 $393.00
99-00	3.8	25% Dampner Crank Pulley	950 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. You are receiving two parts, but removing one. A new balancer pulley and underdrive pulley. 1. Remove water bottle and fan. 2. Remove crank bolt. 3. Remove belt. 4. Use pulley puller (harmonic balancer puller) to remove crank. 5. Place grease on outside and inside of new balancer snout. 6. Install new balancer without the new pulley. Use balancer to push new balancer on. 7. Apply Loctite Thred Lock #242 or equivalent to threads on bolt. Tighten to 80ft. lbs. 8. Apply Loctite Thread Lock #242 or equivalent to 8mm bolts to hold on new crank pulley that will attach to the harmonic balancer. 9. Bolt to harmonic balancer, torque to 45 ft./lbs. or hand tight. 10. Reinstall fan, water bottle and install new Gates belt K060966. 11. Inspect belt to make sure it is properly seated in all pulley grooves. Turn on vehicle and check to make sure pulley installation does not wobble. When removing the stock harmonic balancer and putting on the new harmonic balancer, look to see if the new hamonic balancer matches the stock harmonic balancer. Some of the 99-00 3.8 have the balancer for the 2001 on them and vice versa. If you find that the new harmonic balancer does not match the stock balancer you will have to get it exchanged for the correct one. 99-00 3.8 Mustang Balancer 2001 3.8 Mustang Balancer	–	–	–	ASP820117 $393.00
94-98	3.8	25% Crank	950 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. Remove existing belt and pulley(s). If alternator pulley is used, it will require an air impact wrench to remove nut. 2. Remove belt. Install new pulley(s). Use Loctite #242, or equivalent, to secure bolts. 3. Install Gates belt K060960 for the Mustang and Thunderbird. On the 4.2 Truck install Gates belt K060870. 4. Insure adjustment marks on tensioner are within the limit marks. Make sure belt is properly seated in pulley grooves. Turn on vehicle and inspect pulleys for proper installation.	–	–	–	ASP826300 $115.00
94-98	3.8	25% Crank2 3/4″ Alternator	950 RPM		–	–	–	ASP826308 $120.00

* Clear HC., Red and Blue also available.
** Will not work on LS Lincoln

1989-94 Thunderbird Super Coupe 3.8L V6L

1989-94 3.8L S/C Blower Pulley
10% Blower Overdrive Pulley Adds 3 PSI Boost,
Adds 12+ HP Part# ASP52009

1989-94 3.8L S/C Street Pulley Kit
Street Pulley Kit 25% Reduction Crank Pulley,
29% Water Pump, 3″ Alt.Part# ASP520425
DISCONTINUED

Year	Engine	Pulley Description	Full Charge	Info	Image	Nitride	Hard Coat Black Alum
94-97	4.6	25% Harmonic Dampner 26% Water Pump 15% Alternator	900 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. Loosen water pump bolts and alternator nut. An impact with swivel will be required to loosen alternator nut. 2. Remove belt. Tensioner is accessible from under car. CAUTION: Insure car is properly secured on jack stands before accessing underside of car. 3. With transmission in first gear and emergency brake applied, remove harmonic balancer bolt. An impact wrench will be required with automatic transmission. Remove harmonic balancer using a 3 prong balancer remover. Remove water pump and alternator pulleys. 4. Apply high temperature silicone sealer to underdrive harmonic balancer keyway. Install harmonic balancer onto shaft. Use 12mm x 60mm bolt to engage harmonic balancer on shaft only far enough to engage factory bolt then remove. CAUTION: Do not tighten 12mm x 60mm bolt as damage to threads may occur. Torque factory bolt as follows: 1.) Torque to 75 lb/ft. 2.) Back out 1 turn 3.) Torque to 45 lb/ft and then tighten as additional 1/4 turn. 5. Install new water pump, alternator pulley and factory belt. Insure belt is seated properly in all pulleys. Tighten water pump bolts and alternator nut. A 1/2″ drive impact with 70-80 psi is required to tighten alternator nut. 6. Start engine. Inspect all pulleys to insure no wobble and that belt is properly installed.	–	ASP527328 $238.95	–
94-97	4.6	25% Crank 26% Water Pump 15% Alternator	900 RPM		–	ASP527728 $136.50	–
89-95	3.8 SC	10% Blower Overdrive Adds 3 PSI Boost	950 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. REMOVE HEX BOLT IN BLOWER SHAFT WITH AIR IMPACT WRENCH. 2. RELAX BELT TENSION AND REMOVE PULLEY. A THREE JAW PULLER MAYBE REQUIRED TO REMOVE PULLEY. 3. INSTALL OVERDRIVE PULLEY ONTO SHAFT INSURING SLOT IN PULLEY ALIGNS WITH KEY IN SHAFT. 4. REINSTALL BOLT. PULLEY WILL SEAT ON SHAFT AS BOLT IS TIGHTENED. 5. REINSTALL FACTORY BELT. IF NEW BELT IS REQUIRED INSTALL GATES BELT K080390.	–	ASP520009 $109.95	–
90-98	3.8	25% Crank 2 3/4″ Alternator	950 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Loosen alternator nut with impact socket and swivel. Loosen four water pump bolts. Remove belt. 2. Use a large pair of channel locks to hold water pump pulley OD. With a 1 7/16 endwrench, losen hex bushing by rotating counter clockwise. 3. Remove shroud and fan by working upward. 4. Remove factory pulleys and install underdrive pulleys. Note: The new crankshaft pulley should be installed with the shallow side of pulley facing crankshaft. 5. Reinstall factory belt. Tighten all bolts and alternator nut. 6. Insure tensioner is within the limit marks.	–	–	ASP826308 $120.00
90-93	5.0	25% Crank 29% Water Pump 2 3/4″ Alternator	950 RPM		–	ASP523528 $125.00	–

Crown Victoria / Grand Marquis

Year	Engine	Pulley Description	Full Charge	Info	Image	Steel
81-89	5.0, 351W	25% Crank	850 RPM	–	–	ASP928900 $150.00

Contour / Cougar with SVT Duratec

Year	Engine	Pulley Description	Full Charge	Info	Image	Clear HardCoat Alum
95-99	2.0L	15% Reduction	800 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. JACK UP FRONT OF CAR, PLACE JACK STANDS UNDER PASSENGER SIDE FRAME. PLACE BLOCKS BEHIND REAR WHEELS TO PREVENT CAR FROM ROLLING BACK. 2. REMOVE RIGHR WHEEL. 3. REMOVE UNDERSIDE PLASTIC BODT PIECE. 4. REMOVE CRANK BOLT. LOOSEN BELT AND REMOVE CRANK PULLEY. 5. REMOVE LOWER TIMING DUST COVER. YOU WILL NOT NEED TO PUT IT BACK ON. PLACE SCREWS BACK INTO HOLES TO PREVENT BLOCKAGE. 6. PUT ON NEW ASP CRANK PULLEY. APPLY LOCTITE #242 OR EQUIVALENT TO SECURE BOLT. TIGHTEN BOLT TO 80-100 FT/LBS. 7. FOR ESCORT INSTALL NEW GATES BELT K060845. REPLACE ALL PARTS IN REVERSE ORDER. TURN ON VEHICLE AND INSPECT FOR PROPER BELT ALIGNMENT AND INSURING THAT THE NEW INSTALLED PULLEY DOES NOT WOBBLE. BELTS 3.0L ESCAPE , K060810 CONTOUR 95-99 K060721 W/O A/C K060670 FOCUS ZX2 00 K060825		ASP840110 $124.95

Ford Truck

Year	Engine	Pulley Description	Full Charge	Info	Image	Nitride	Zinc	Hard Coat Black Alum
02-09	4.6, 5.4	25% Harmonic Dampner26% Water Pump	850 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Loosen water pump bolts. 2. Remove belt. Tensioner is accessible from under truck. CAUTION: Insure truck is properly secured on jack stands before accessing underside of truck. 3. With transmission in first gear and emergency brake applied, remove harmonic balancer bolt. An impact wrench will be required with automatic transmission. Remove harmonic balancer using a 3 prong balancer remover. Remove water pump pulley. 4. Apply high temperature silicone sealer to underdrive harmonic balancer keyway. Install harmonic balancer onto shaft. Use 12mm x 60mm bolt to engage harmonic balancer on shaft only far enough to engage factory bolt then remove. CAUTION: Do not tighten 12mm x 60mm bolt as damage to threads may occur. Torque factory bolt as follows: 1.) Torque to 75 lb/ft. 2.) Back out 1 turn 3.) Torque to45 lb/ft and then tighten an additional 1/4 turn. 5. Install new water pump pulley and factory belt. Insure belt is seated properly in all pulleys. Tighten water pump bolts. (NOTE: on the 1999 -03 5.4 trucks, there is an aluminum nipple sticking out from block. It is located at the bottom right hand corner near waterpump. You have to grind this off in order to get the water pump pulley to fit.) 6. Start engine. Inspect all pulleys to insure no wobble and that belt is properly installed.	–	ASP527374 $227.95	–	–
97-01	4.6, 5.4	25% Harmonic Dampner26% Water Pump	850 RPM		–	ASP528774 $227.95	–	–
01-07	4.2	Harmonic Dampner25% Crank Pulley	850 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. You are receiving two parts, but removing one dampner. A new dampner and underdrive Pulley are supplied. 1. Remove fan. This can be done with a large wrench or impact chisel. Threads are standard. 2. Remove crank bolt. 3. Remove belt. 4. Use harmonic balancer puller tool to remove crank. 5. Unbolt ASP pulley from new dampner. 6. Install new dampner applying grease to crank. 7. Use dampner/balancer installation tool to install new dampner. 8. Apply loctite thread locker to crank bolt and torque to 85 ft.lbs. 9. Bolt new pulley to dampner with 8mm bolt supplied. Torque to 45 ft.lbs. 10. Reinstall fan and new Gates belt pn K061000. 11. Inspect pulley and belt for proper alignment. ASP does not warranty dampner or pulley if improperly installed. Do not hammer dampner onto crank. This will cause vibration problems.	–	–	–	ASP820130 $318.00
99-00	4.2	Harmonic Dampner25% Crank Pulley	850 RPM		–	–	–	ASP820129 $318.00
97-98	4.2	25% Crank Pulley	850 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. Remove existing belt and pulley(s). If alternator pulley is used, it will require an air impact wrench to remove nut. 2. Remove belt. Install new pulley(s). Use Loctite #242, or equivalent, to secure bolts. 3. Install Gates belt K060960 for the Mustang and Thunderbird. On the 4.2 Truck install Gates belt K060870. 4. Insure adjustment marks on tensioner are within the limit marks. Make sure belt is properly seated in pulley grooves. Turn on vehicle and inspect pulleys for proper installation.	–	–	–	ASP826300 $115.00
92-08	3.0L Ranger	20% Crank Pulley	850 RPM	Auto Specialties recommends these pulleys be installed by a qualified mechanic. 1. Loosen 2 fan shroud bolts one each side. 2. Remove fan. Thread is reverse counter clockwise. Remove shroud and fan. You may have to hold the wp pulley to keep from turning while removing the fan. If so the bolts are 10mm. 3. Loosen 4 crank bolts 13mm . 4. Remove belt. The tensioner bolt is 15mm. 5. Remove crank pulley. 6. Install ASP crank pulley using factory bolts. Torque to 45 ft lbs. 7. Install new Gates belt pn K060864 8. Reinstall fan shroud and fan. 9. Start truck and check for wobble of pulley. If none than install was correct.	–	–	–	ASP821120 $112.00
90-03	4.0L Ranger/Explorer	25% Dampner	900 RPM	–		ASP526400 $285.00	–	–
80-86	5.0, 5.8	30% Crank	800 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Loosen belt adjustment screws on smog pump, alternator, AC and power steering. Remove belts. 2. Remove factory crank pulley bolts and factory crank pulley. Remove alternator pulley if new one is supplied with kit. 3. Install Auto Specialties crank pulley with four internal hex bolts supplied. Use Loctite #242 (or equivalent) to secure bolts. Torque bolts to 45 ft. Lbs. 4. Install Goodyear belts (or equivalent) as follows: Power Steering 17484 Air Conditioner 17570 Alternator 15346 Air Pump Factory belt 5. Tighten all belts.	–	ASP523000 $130.00	–	–
80-86	5.0, 5.8	30% Crank3″ Alternator	1000 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Loosen belt adjustment screws on smog pump, alternator, AC and power steering. Remove belts. 2. Remove factory crank pulley bolts and factory crank pulley. Remove alternator pulley if new one is supplied with kit. 3. Install Auto Specialties crank pulley with four internal hex bolts supplied. Use Loctite #242 (or equivalent) to secure bolts. Torque bolts to 45 ft. Lbs. 4. Install Goodyear belts (or equivalent) as follows: Power Steering 17484 Air Conditioner 17570 Alternator 15346 Air Pump Factory belt 5. Tighten all belts.	–	ASP523003 $150.00	–	–
87-97	5.0, 5.8	30% Crank	850 RPM	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Remove existing belt and craftshaft pulley 2. Install new pulley with internal hex bolts supplied. Tighten hex bolts evenly. Use Loclite #242 (or equivalent) on threads. 3. If ASP Bracket (020400)is not used, install new belt. Belts are readily available at most parts stores. 4. We recommend warm idle speed for automatic cars set at 650-700 RPM in drive. Standard shift 700-750 RPM.	–	–	–	ASP820100 $68.00
87-97	5.0, 5.8	30% Crank15% Water Pump	1100 RPM		–	ASP520120 $125.00	–	–
93-94	2.3	25% Crank	1000 RPM	Get Up To “15” Extra Horsepower In 30 Minutes! You”ll also get better fuel milage and increased accessory life! Auto Specialties recommends that these pulleys be installed by a qualified mechanic. 1. Remove existing belt and crankshaft pulley. 2. Install new pulley. Use Loctite Thread Loc #242 or equivalent to secure bolts. 3. Install Gates Belt K060825.	–	–	–	ASP926500 $175.00

1999-2004 SVT Lightning Truck

1999-2004 5.4L Blower Pulley
1999-04, – 5.4 L Ligntning Truck Blower Pulley, 2.80″, adds 3 psi to engine and 23.2 extra hp,
Part# ASP520003 *

Year	Engine	Pulley Description	Info	Image	Nitride	Hard Coat Black Alum
99-04	5.4	Blower Compressor Overdrive Pulley 2.93″ Diameter(+2 to 3″psi)	Auto Specialties recommends that these pulleys be installed by a qualified mechanic. ENGINE MUST BE COLD. ASP RECOMMENDS THAT PULLEY INSTALLATION AND REMOVAL BE DONE BY QUALIFIED TECHNICIANS ONLY. ASP ASSUMES NO RESPONSIBILITY FOR DAMAGES THAT MAY OCCUR DURING REMOVAL OR INSTALLATION 1. REMOVE AIR INLET TUBE AND MOVE TO SIDE. 2. REMOVE BELT AND BOLT ON SHAFT. 3. INSTALL PULLER AS SHOWN IN FIGURE 1. 4. TURN COUNTER CLOCKWISE TO APPLY PRESSURE TO NUT CLOSEST TO PULLEY. USE ANOTHER WRENCH TO KEEP OUTER WELDED NUT FROM TURNING. NOTE: DURING INSTALL, THE WELDED END OF THE INSTALL SHAFT MUST NOT TURN. IF IT TURNS YOU WILL BREAK OFF THE PILOT SCREW IN THE BLOWER SHAFT. TWO WRENCHES ARE REQUIRED TO PREVENT THE TIGHTING OR UNTIGHTING OF THE INSTALL SHAFT. 5. LOAD UP PULLER UNTIL PULLEY POPS. THIS WILL ALLOW TIGHT REMOVAL FROM SHAFT. 6. INSTALL NEW PULLEY WITH SMOOTH OR FLAT SIDE TOWARDS RADIATOR. 7. USE FIGURE 2 FOR INSTALLER CONFIGURATION. 8. PRESS ON NEW PULLEY. IT WILL BE A TIGHT FIT ALL THE WAY ON. PULLEY WILL INSTALLED CORRECTLY WHEN SHAFT IS FLUSH WITH PULLEY. 9. REINSTALL ALL FACTORY BELT. 10. REINSTALL AIR INLET HOSE. ON LATER 2000 TRUCKS, EATON HAS ENLARGED THE CASTING AS WELL AS GOT IT OUT OF ROUND. CHECK YOUR BLOWER SNOUT CASE AND IF IT LOOKS OUT OF ROUND, YOU MAY NEED TO REMOVE SOME OF THE EXTRA ALUMINUM. THIS IS RARE BUT HAS HAPPENED. IF YOU DO NOT REMOVE EXCESS ALUMINUM, THE PULLEY WILL NOT GO ALL THE WAY ON AND WILL LOCK UP WITH THE CASE. THIS PULLEY IS NOT DESIGNED TO BE INSTALLED AND REMOVED MORE THAN ONCE. REMOVEL WILL DISTORT THE PULLEY SO IT IS INOPERABLE. ASP WILL NOT WARRANTY FOR DEFECT OR FAILURE SINCE THE PULLEY IS DESIGNED THIS WAY. ENJOY THE EXTRA POWER!	–	ASP520002 $109.95	–
99-04	5.4	Blower Compressor Overdrive Pulley 2.80″ Diameter(+3 to 4″psi)		–	ASP520003 $109.95	–
99-00	5.4	Blower Crank Pulley 8.40″ Diameter (+4″psi)	–	–	–	ASP820116ps $225.00
01-04	5.4	Blower Crank Pulley 8.40″ Diameter (+4″psi lightning +2″psi harley)	–	–	–	ASP820116aps $225.00
99-00	5.4	Blower Crank Pulley 9.00″ Diameter (+6″psi)	–	–	–	ASP820116ps9 $225.00
01-04	5.4	Blower Crank Pulley 9.00″ Diameter (+6″psi lightning +4″psi harley)	–	–	–	ASP820116aps9 $225.00

Early Model Crank Pulleys

Year	Engine	Pulley Description	Info	Image	Steel
65-69	289 (3 Bolt)	25% Reduction – 1 V-Groove	–	–	ASP922900 $125.00
65-69	289 (3 Bolt)	2 V Grooves	–	–	ASP924200 $150.00
70-78	302, 351 W	25% Reduction – 1 V Grooves	–	–	ASP924000 $125.00
70-78	302, 351 W	2 V Grooves	–	–	ASP924100 $150.00
68-87	429, 460	25% Reduction – 3 V Grooves	–	–	ASP925600 $150.00

Alternator Pulleys

For Serpentine Belt Systems
32% overdrive alternator pulley.
Increased charging capacity.
CNC -machined billet steel nitride coated.

Year	Engine	Pulley Description	Info	Image	Nitride	Zinc	Hard Coat Black Alum
–	Early Model	3 1/4″ 1 V-Groove	–	–	–	–	ASP820003 $54.95
79-95	5.0	1 7/8″ Alternator	–	–	ASP520004 $32.00	–	–
79-93	5.0	2 1/2″ Alternator	–	–	ASP520005 $38.00	–	ASP820005 $34.00
79-95	5.0	2 3/4″ Alternator	–	–	ASP520080 $26.95	–	ASP820080 $34.00
79-93	5.0	3 1/2″ Alternator	–	–	–	–	ASP820006 $95.00