ASP Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. Auto mechanics use ASP underdrive pulleys as a replacement pulley that contains a different ratio and material specifications that free up lost horsepower. By using an ASP underdrive pulley, you are increasing the diameter of each accessory pulley and decreasing the ratio of the crank pulley. The speed at which the accessories are turning relative to the engine's rpm's decrease.
By installing a resized Auto Specialties Performance pulley, the accessories are slowed. This results 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.
Why should you buy a Auto Specialties Performance underdrive pulley? Auto Specialties Performance has been in operation since 1988. All ASP pulleys are manufactured from Billet Steel...Read More
ASP Underdrive Pulley 25% Underdrive LS1 Camaro Street/Strip V8; 1998-2002
CATALOG # 00599
SKU: 948500
Starting at $32/month
with .
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ASP Underdrive Crank & Underdrive Alternator Pulley (SFI Approved) (Racing) Camaro V8; 1998-2002
CATALOG # 00598
SKU: 948584
Starting at $33/month
with .
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ASP LT-1 2 pulley Kit 34% Crank, 15% alt Camaro V8; 1993-1997
CATALOG # 003665
SKU: 847601
Pay Monthly Over Time
with .
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ASP Mustang V6 Harmonic Balancer Crank Pulley; 1999-2000
CATALOG # 0015838
SKU: 820117
Starting at $40/month
with .
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
CATALOG # 00515986
SKU: 549900
Starting at $32/month
with .
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
CATALOG # 00515984
SKU: 549900
Starting at $32/month
with .
SEE DETAILS
ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
CATALOG # 00515990
SKU: 549900
Starting at $32/month
with .
SEE DETAILS
ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
CATALOG # 0015955
SKU: 549900
Starting at $32/month
with .
SEE DETAILS
ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
CATALOG # 00515988
SKU: 549900
Starting at $32/month
with .
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ASP LT-1 pulley 23% Crank, 15% Alt "Nitride" Camaro V8; 1993-1997
CATALOG # 003668
SKU: 945103
Starting at $19/month
with .
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ASP Underdrive Pulley (SFI Approved) 25% Harmonic Dampner Crank; 1997-2004
CATALOG # 005945
SKU: 941020
Starting at $35/month
with .
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ASP Mustang V6 Harmonic Balancer Crank Pulley; 2001-2004
CATALOG # 0015837
SKU: 820122
Starting at $40/month
with .
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ASP Supercharger 3.25 +6 lbs of Boost Pulley 540025; 1997-2008
CATALOG # 005928
SKU: 540032
Pay Monthly Over Time
with .
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ASP LT-1 pulley 23% Crank "Nitride" Camaro V8; 1993-1997
CATALOG # 003667
SKU: 945100
Starting at $17/month
with .
SEE DETAILS
ASP Underdrive Pulley 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
CATALOG # 00515985
SKU: 549984
Starting at $33/month
with .
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ASP Supercharger 3.40 +4 lbs of Boost Pulley; 1997-2008
CATALOG # 005929
SKU: 540034
Pay Monthly Over Time
with .
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ASP 25% Harmonic Dampner, 26% Water Pump, 8% Alternator for Mustang GT V8; 2001-2004
CATALOG # 005931
SKU: 522328
Starting at $29/month
with .
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ASP Underdrive Pulley 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
CATALOG # 00515991
SKU: 549984
Starting at $33/month
with .
SEE DETAILS
ASP Dodge Ram 5.7L Underdrive Pulley; 2003-2007
CATALOG # 006809
SKU: 501360
Starting at $39/month
with .
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ASP Underdrive Pulley 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
CATALOG # 00515987
SKU: 549984
Starting at $33/month
with .
SEE DETAILS
ASP Underdrive Pulley 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
CATALOG # 00515989
SKU: 549984
Starting at $33/month
with .
SEE DETAILS
ASP Underdrive Pulley 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
CATALOG # 0024205
SKU: 549984
Starting at $33/month
with .
SEE DETAILS
ASP Underdrive Pulley 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
CATALOG # 00515994
SKU: 549984
Starting at $33/month
with .
SEE DETAILS
ASP Supercharger 3.50 +2 lbs of Boost Pulley; 1997-2008
CATALOG # 005930
SKU: 540035
Pay Monthly Over Time
with .
SEE DETAILS
About ASP
ASP Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. Auto mechanics use ASP underdrive pulleys as a replacement pulley that contains a different ratio and material specifications that free up lost horsepower. By using an ASP underdrive pulley, you are increasing the diameter of each accessory pulley and decreasing the ratio of the crank pulley. The speed at which the accessories are turning relative to the engine's rpm's decrease.
By installing a resized Auto Specialties Performance pulley, the accessories are slowed. This results 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.
Why should you buy a Auto Specialties Performance underdrive pulley? Auto Specialties Performance has been in operation since 1988. All ASP pulleys are manufactured from Billet Steel or Aluminum, exceeding factory quality. ASP pulleys start out as as a solid bar of either 6061-T6 Alum or 1045-carbon steel.
If you were able to tour the Auto Specialties Performance factory you would be able to see for yourself how intricate and exacting the production process is from the beginning where all of the solid bars have to be cut to size using an automatic saw that can cut within .010 of an inch. Next they are machine lathed with specifications that can be tweaked to as little as .0003 thousandths of an inch for a perfect fit and then any necessary millwork takes place. And for the most important part, quality control procedures are tantamount at the facility safeguards are in place at all stages of the total operation to assure that the customer gets a product that is manufactured to perfection. From this visit it would be easy to see why Auto Specialties Performance (ASP) has been the leader in the underdrive pulley market for twenty years and why they should be trusted with you are in the market for and underdrive part .
The ASP UNDERDRIVE CRANK AND UNDERDRIVE ALTERNATOR PULLEY that is SFI approved racing for your 1998-02 Firebird V8 can give you back some of the much needed horsepower that is stolen by your water pump, A/C compressor and power steering when powered by a factory installed pulley and as a plus you can see up to a 15 percent increase in horsepower with the underdrive pulley system. And for better performance in your Corvette consider the ASP Underdrive Pulley SFI Approved 25% Harmonic DAMPNER Crank for a reduction in crankshaft torsional vibration, greater valve train and timing efficiency and a reduction in wear to the car’s main bearings, oil pump and crankshaft. And if you are on the racing circuit with your Camaro you might be interested in the ASP LT-1 pulley 23% Crank 'Nitride' Camaro 1993-97 V8 with its nitride coating that diffuses nitrogen into the surface creating a much harder surface and more durable product so important considering the rigors of racing. If you're looking for a performance exhaust, check out our Borla Exhaust Systems here!