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  • ASP
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About ASP

ASP Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. Auto mechanics use underdrive pulleys as a replacement pulley that contains a different ratio and material specifications that free up lost horsepower. By using an 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 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 an Underdrive Pulley by ASP? ASP 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.

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Originating in 2001 the work force at Late Model Performance has maintained a noteworthy level of customer service and has made available a multifarious selection of new performance automobile parts and appurtenances represented by some of the preeminent names in the automobile performance parts industry. The vehicles represented range from 1950 to the present date and our inventory is tremendous and is continually rejuvenated for the purpose of offering an incomparable number and multiplicity of parts to meet the customer's every need. Our 5 star service is an additional reason to shop at Late Model Performance.

As you can see from the listing above Late Model Performance can meet all of your performance parts needs since we carry parts for a wide assortment of vehicles from Acura to Yugo, including some rare and unusual vehicles such as the Bricklin and the sports models such as the Corvette, Camaro, BMW and Jaguar just to mention a few. The Team at Late Model Performance is committed to excellence in customer service and can facilitate your search for the appropriate part for your car so that you can make it the best it can be. We diligently search for parts that will satisfy the most perspicacious customer and since our goal is to meet all of your performance parts needs our staff searches every day to find the inimitable parts with the most outstanding quality and for a price that is second to none. By offering you parts from some of the leaders in the industry Late Model Performance can give you a preeminent selection and at a price that is affordable . Since our goal is to fulfill your order promptly so that you can get started on your improvement or repair in a timely manner, the staff is constantly improving the web site in order to make it easier for you to navigate to the correct part and to place your order. In addition, we double check your order so that we circumvent an unnecessary delay caused by misinformation and of course we offer free shipping on most orders for a yet better price that helps you stay within your budget. Since our inception we have made it our objective to find you parts for the right price so that you can make your improvement or repair affordable and easy. You will find parts from manufacturers such as Borla, American Racing, Ford Racing and many other quality manufacturers. As you can see we have been in business for 15 years under the same ownership and management and have implemented improvements throughout those years to give you a more satisfying shopping experience. and we are dedicated to constant improvement and continually look for unparalleled parts to offer you at the best price.