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Accessory Pulley Kit Parts - 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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Timing and Accessory Assembly
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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 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 Underdrive Street Pulley Sets Pulley Set - Serpentine - Steel - Nitride - GM - V6 - Set
Brand: Auto Specialties Performance
Part #: 541801
Starting At
$68.39
