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!
ASP Underdrive Pulley (SFI Approved) 25% Underdrive LS1 Camaro Street/Strip V8; 1998-2002
ASP
CATALOG # 00599
MPN #: 948500
$215.20Free Shipping
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ASP Underdrive Crank & Underdrive Alternator Pulley (SFI Approved) (Racing) Camaro V8; 1998-2002
ASP
CATALOG # 00598
MPN #: 948584
$262.45Free Shipping
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ASP LT-1 2 pulley Kit 34% Crank, 15% alt Camaro V8; 1993-1997
ASP
CATALOG # 003665
MPN #: 847601
$104.95Free Shipping
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ASP Mustang V6 Harmonic Balancer Crank Pulley; 1999-2000
ASP
CATALOG # 0015838
MPN #: 820117
$333.90Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
ASP
CATALOG # 00515984
MPN #: 549900
$235.20Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
ASP
CATALOG # 00515986
MPN #: 549900
$235.20Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
ASP
CATALOG # 00515988
MPN #: 549900
$235.20Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
ASP
CATALOG # 00515990
MPN #: 549900
$235.20Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive 4.8, 5.3, 6.0 Truck; 1994-2010
ASP
CATALOG # 0015955
MPN #: 549900
$235.20Free Shipping
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ASP LT-1 pulley 23% Crank, 15% Alt "Nitride" Camaro V8; 1993-1997
ASP
CATALOG # 003668
MPN #: 945103
$173.20Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Harmonic Dampner Crank; 1997-2004
ASP
CATALOG # 005945
MPN #: 941020
$261.40Free Shipping
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ASP Mustang V6 Harmonic Balancer Crank Pulley; 2001-2004
ASP
CATALOG # 0015837
MPN #: 820122
$333.90Free Shipping
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ASP Supercharger 3.25 +6 lbs of Boost Pulley 540025; 1997-2008
ASP
CATALOG # 005928
MPN #: 540032
$99.75Free Shipping
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ASP LT-1 pulley 23% Crank "Nitride" Camaro V8; 1993-1997
ASP
CATALOG # 003667
MPN #: 945100
$152.20Free Shipping
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ASP Supercharger 3.40 +4 lbs of Boost Pulley; 1997-2008
ASP
CATALOG # 005929
MPN #: 540034
$104.95Free Shipping
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ASP 25% Harmonic Dampner, 26% Water Pump, 8% Alternator for Mustang GT V8; 2001-2004
ASP
CATALOG # 005931
MPN #: 522328
$256.20Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
ASP
CATALOG # 00515985
MPN #: 549984
$262.45Free Shipping
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ASP Dodge Ram 5.7L Underdrive Pulley; 2003-2007
ASP
CATALOG # 006809
MPN #: 501360
$293.95Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
ASP
CATALOG # 0024205
MPN #: 549984
$262.45Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
ASP
CATALOG # 00515991
MPN #: 549984
$262.45Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
ASP
CATALOG # 00515994
MPN #: 549984
$262.45Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
ASP
CATALOG # 00515989
MPN #: 549984
$262.45Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive / 23% alt 4.8, 5.3, 6.0 Truck; 1994-2009
ASP
CATALOG # 00515987
MPN #: 549984
$262.45Free Shipping
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ASP Supercharger 3.50 +2 lbs of Boost Pulley; 1997-2008
ASP
CATALOG # 005930
MPN #: 540035
$104.95Free Shipping
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ASP Mustang GT Pulley Kit V8; 2005-2010
ASP
CATALOG # 005924
MPN #: 527305
$257.25Free Shipping
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ASP LT-1 2 pulley Kit 34% Crank, 15% alt Firebird V8; 1993-1997
ASP
CATALOG # 0078418
MPN #: 847601
$104.95Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Harmonic Dampner Crank; 1997-2004
ASP
CATALOG # 006547
MPN #: 941020
$261.40Free Shipping
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ASP LT-1 pulley 23% Crank, 15% Alt Nitride Firebird V8; 1993-1997
ASP
CATALOG # 0078420
MPN #: 945103
$173.20Free Shipping
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ASP Underdrive Crank & Underdrive Alternator Pulley (SFI Approved) (Racing) Firebird V8; 1998-2002
ASP
CATALOG # 0078798
MPN #: 948584
$262.45Free Shipping
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ASP Underdrive Pulley (SFI Approved) 25% Underdrive LS1 Firebird Street/Strip V8; 1998-2002
ASP
CATALOG # 0078799
MPN #: 948500
$215.20Free Shipping
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ASP - 5.4 L Ligntning S/C pulley 2.8 Inch Diam psi / + 5 psi Harley; 1999-2004
ASP
CATALOG # 0079461
MPN #: 520003
$115.45Free Shipping
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ASP Mustang V6 Crank Pulley Only (no balancer); 1994-1998
ASP
CATALOG # 0015839
MPN #: 826300
$94.45Free Shipping
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ASP 25% Harmonic Dampner, 26% Water Pump, 10% Alternator for Mustang Cobra V8; 1999-2001
ASP
CATALOG # 005932
MPN #: 522375
$256.20Free Shipping
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ASP 25% Harmonic Dampner, 26% Water Pump, 8% Alternator for Mustang GT V8; 1996-2000
ASP
CATALOG # 005933
MPN #: 527328
$249.90Free Shipping
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ASP LT-1 pulley 23% Crank Nitride Firebird V8; 1993-1997
ASP
CATALOG # 0078419
MPN #: 945100
$152.20Free Shipping
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Reviews for ASP's products are show below.
ASP Underdrive Pulley (SFI Approved) 25% Underdrive LS1 Camaro Street/Strip V8; 1998-2002Current Mods:
slp-headers, high flow cats, y-pipe, magnaflow exhaust, sphon torque arm, sphon tubular sub frame connectors, sphon drive shaft, sphon rear tubular adjustable lower control arms , three inch steel drive shaft rated to hold 1,200 horse power, 4.11 moser 12 bolt rear, short throw shifter, slp flow pac, drilled and slotted bear rotors and ebc green stuff pads on all four corners, 20% tint all around, 90 mm slp mass air flow sensor, and asp 25% underdrive pulley.