Porsche Boxster 986 Power Steering Underdrive Pulley - $100 shipped

This reduction remedies the problem of the stock Power Steering Pump overheating during spirited driving, such as time at the track. The Power Steering Pump being driven at these lower rates keep it running cooler, without any difference in steering feel.

The pulley slows the Power Steering Pump by having a larger belt diameter. The increased size is not enough to require a new belt; and unlike the crank pulley, the bolts holding this pulley on are able to be reused.

The Cheetah Underdrive Power Steering Pulley offers the benefit of slowing down the pump to help keep power steering fluid cooler, without having to under drive the entire system (for those who do not wish to follow that route). 

OTHER PORSCHE BOXSTER CHEETAH PRODUCTS:

LIGHTWEIGHT UNDERDRIVE CRANK PULLEY

SOLID DELRIN FRONT MOTOR MOUNT

POLYURETHANE FRONT MOTOR MOUNT

ALUMINUM REAR SUSPENSION BRACE

Underdrive pulleys achieve both of these goals with a two-fold approach.

Stock accessory pulleys are usually made of heavy, cast steel. They are produced to be made at the cheapest possible price. These steel pulleys require a significant percentage of an engines power to rotate them. Using lighter Aluminum alloys, along with detailed machining processes, the pulley can be made as light as possible; requiring less power to rotate it. This recovered power is an increase easily seen on a dyno and felt during everyday driving.

Also, these pulleys are made with a smaller diameter than the stock pulley. This rotates the belt driven accessories at a slightly slower pace (around 10-13% slower). Since each accessory takes power to turn, hp and torque are regained through the "underdriving" process also.

Typical hp increase are around 5%. So for a 200hp engine, an increase of 10hp is easily possible.