UUC Motorwerks Ultimate Under Drive Pulley Set
Take back that lost horsepower! A car's engine does many things other than just making the car move. Power is used to run the various accessories... things like the water pump, power steering pump, and alternator. All of these use horsepower, horsepower that is lost. Power that could be making the car faster. Each accessory uses rotary power - each accessory is turned to perform it's function, whether it's an electrical component (the alternator) or a fluid displacing component (the water pump and power steering pump). They all have a pulley which takes power from the crankshaft pulley via a belt. Some of the engine accessories take more power than they really need, dramatically affecting engine performance. Driving these accessories at higher rpm is a waste of energy, running it at a much higher rate than it needs to for optimum effectiveness. This is energy which could be put toward acceleration instead.
An underdrive pulley is a replacement accessory pulley that bolts up the same as stock, but has a different size (ratio) and material specifications intended to free up lost horsepower. By increasing the diameter of each accessory pulley, the speed at which the accessories are turning relative to engine RPM decreases. Underdriving the accessories does not add power to the engine, it frees up the power that is normally wasted on overdriven accessories. The theory is that a larger pulley will drive the accessories slower thus reducing their parasitic horsepower loss. No more power total, but more power sent to the wheels. As an additional benefit, the reduction in wear (less usage) on the accessories due to the lower duty cycles can extend the life of these parts.
- Underdrive power steering pulley
- Underdrive water pump pulley
- Serpentine belt
NOTE: Clicking links will set/change vehicle selection.
- 1998 BMW Z3 2.3
- 1999 BMW Z3 2.3
- 2000 BMW Z3 2.3
- 2001 BMW Z3 2.3
- 2002 BMW Z3 2.3
- 2001 BMW Z3 2.5
- 2002 BMW Z3 2.5
- 1997 BMW Z3 2.8
- 1998 BMW Z3 2.8
- 1999 BMW Z3 2.8
- 2000 BMW Z3 2.8
- 1998 BMW Z3 2.8 Coupe
- 1999 BMW Z3 2.8 Coupe
- 2000 BMW Z3 2.8 Coupe
- 2001 BMW Z3 3.0
- 2002 BMW Z3 3.0
- 2001 BMW Z3 3.0 Coupe
- 2002 BMW Z3 3.0 Coupe
UUC is dedicated to engineering excellence, superior design, and ultimate performance. The company's guiding philosophy has always been: "If we can make something, we'll make it better. If we make it, it will be the best."
Opening its doors in 1998, UUC was quickly recognized as the technology-focused leader in their specialty components. While initially recognized for revolutionizing the short shifter kit, development of a large base of other parts has solidified their reputation for premiere quality and peerless performance results.
UUC produces a broad catalog of vehicle components, including:
UUC's line of "street-friendly, yet race-capable" components are primarily manufactured in UUC's own Georgia (U.S.A.) facilities. UUC's commitment to American manufacturing is further strengthened with the opening of a new CNC manufacturing center, providing expanded local employment, and constant attention to production and assembly processes, assuring customers of quality and integrity in every component that UUC offers.
Everything we sell comes with a minimum 12-month warranty and a 100% satisfaction guarantee. In addition, products that carry the Bavarian Autosport brand come with a minimum 2-year warranty against defects in materials and workmanship. (Some have lifetime warranties!) If you are unhappy with a product's quality or performance, simply let us know. We'll make it right. Call us at 800.535.2002 or e-mail [email protected].