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Auto Specialties Performance
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Auto Specialties Performance Overview
Auto Specialties underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external accessories. For example, the alternator, power steering, water pump and air conditioner all 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 drive the rear wheels. Typically, a set of Auto Specialties street pulleys will increase output by 12 to 15 horsepower, resulting in quarter mile time improvements of .2 to .25 seconds. All pulleys are CNC machined from billet steel or aluminum, exceeding factory quality.
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Auto Specialties Smog Pump Eliminator Brackets Bracket - Smog Pump Eliminator - Aluminum - Natural - Ford - Mustang - 5.0L - Kit
Brand: Auto Specialties Performance
Part #: 025030
This smog pump eliminator bracket allows you to free up some additional horsepower. It mounts in the same location that the smog pump did and even uses the same belt.
Starting At
$67.95
Auto Specialties Underdrive Crankshaft Pulleys Crankshaft Pulley - Serpentine - 4-Groove - Aluminum - Nitride - Honda - Civic - Civic Del Sol - 1.5 - 1.6L
Brand: Auto Specialties Performance
Part #: 339000
Pulley specification:
Crankshat: 25% slowerAn underdrive pulley requires different length belts then OEM. Use part numbers GTR-4040285 and GTR-4040290.This Auto Specialties pulley your crankshaft pulley. It turns than stock and provides about 15... more
Auto Specialties Underdrive Crankshaft Pulleys Crankshaft Pulley - Serpentine - 4-Groove - Aluminum - Nitride - Mitsubishi - Eclipse - 2.0L
Brand: Auto Specialties Performance
Part #: 339300
* Fits turbo model only.
* Pulley specification:
Crankshat: 9% slowerThis underdrive pulley requires the use of a different length belts then OEM. Use belt numbers GTR-4040360 and GTR-4040385.This Auto Specialties pulley replaces your crankshaft... more
Acura: 1994-98 1.8L VTEC Integra GSR/Integra Type R carbon steel black nitride finish underdrive crankshaft pulley
Brand: Auto Specialties Performance
Part #: 339500
Fits DOHC engines only.This underdrive crankshaft pulley requires the use of a longer length belt then OEM.This Auto Specialties pulley your crankshaft pulley. It turns than stock and provides about 15 extra horses--for about 30 minutes of work.... more
Auto Specialties Underdrive Crankshaft Pulleys Crankshaft Pulley - Serpentine - 6-Groove - Steel - Nitride - Ford - Mercury - 5.0 - 5.8L
Brand: Auto Specialties Performance
Part #: 520100
This alternator is at full charge at 850 rpm.This Auto Specialties crank pulley turns your belt driven accessories 25 percent slower than stock and provides about 15 extra horses--for about 30 minutes work. Youll also get better mileage and... more
Starting At
$45.88
Auto Specialties Underdrive Street Pulley Sets Pulley Set - Serpentine - Steel - Nitride Black - Ford - 5.0L - Set of 3
Brand: Auto Specialties Performance
Part #: 520125
* Crank: 25% underdrive
* Water pump: 15% underdrive
* 2 1/2 in. alternator allows full charge at 950 rpmThese Auto Specialties replacement crank alternator and water pump pulleys turn 25% slower than stock and provide about 15 extra... more
Starting At
$76.95
Auto Specialties Underdrive Street Pulley Sets Pulley Set - Serpentine - Steel - Nitride Black - Ford - Mustang - 5.0L - Set of 3
Brand: Auto Specialties Performance
Part #: 525928
Pulley specifications:
Crankshat: 26% slower
Alternator: 2 3/4 in. O.D.
Water Pump: 30% slowerThis underdrive pulley set retains the factory belt.This Auto Specialties pulley set replaces your crank alternator and water pump pulleys. They turn... more
Auto Specialties Underdrive Crankshaft Pulleys Crankshaft Pulley - Serpentine - 6-Groove - Steel - Nitride - Chevy - GMC - SUV - Pickup - 4.3 - 5.0 - 5.7L
Brand: Auto Specialties Performance
Part #: 541000
The alternator is at full charge at 750 rpm.Does not include bolts.This Auto Specialties crank pulley turns your belt driven accessories 25 percent slower than stock and provides about 15 extra horses--for about 30 minutes work. Youll also get... more
Starting At
$65.69
Auto Specialties Underdrive Crankshaft Pulleys Crankshaft Pulley - V-Belt - 3-Groove - Steel - Nitride - Chevy - Pontiac - Camaro - Firebird - 5.0L - Kit
Brand: Auto Specialties Performance
Part #: 541300
Specifications:
* The alternator is at full charge at 750 rpm
* Fits with 3 V belts onlyMust reuse factory hardware.This Auto Specialties crank pulley turns your belt driven accessories 25 percent slower than stock and provides about 15 extra... more
Starting At
$68.69
Auto Specialties Performance Racing Pulleys Pulley Set - Serpentine - Steel - Nitride Black - Ford - 5.0 - 5.8L - Set of 3
Brand: Auto Specialties Performance
Part #: 580125
Specifications:
* Race pulley sets are for race vehicles only.
* Alternator will not provide full charge until 1600 rpm
* Crankshaft: 52 percent slower
* Alternator: 2 1/2 in. O.D.
* Water Pump: 15% slowerRequired parts:
* This underdrive... more
Starting At
$105.39
Auto Specialties Air Conditioning Eliminator Kits A - C Compressor Eliminator - Ford - Mustang - Kit
Brand: Auto Specialties Performance
Part #: 028200
Starting At
$69.95
