RSS / Road Sport SupplyHarmonically Damped - Underdrive Performance Pulley Kit Including Belt

Product type: Engine
Application:
  • 911 Carrera - 997
  • 911 Carrera - 996
  • Cayman / Boxster - 987
  • More
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Product Description

The RSS Harmonically Damped Underdrive Pulley and new serpentine belt kit is ideal for engines that are running light weight flywheels, engines that are built - bored/stroked and engines that are driven hard.

  • Offers improved HP & TQ by reducing drag from the power steering pump, A/C, water pump and alternator without detrimental effects on said ancillary systems.
  • Dampens/reduces internal engine harmonics for improved engine performance, efficiency and longevity. 
  • Recommended for street or track use

Fits on all Porsche 986, 996, 987, 997 models EXCEPT 2.9L (multi hole crank pulley pattern). NOT for DFI 200 cars or any GT3/TT engine

Installation tool (wrench), new serpentine belt and new OEM Pulley Washer included (also requires modification / clearancing):

MADE IN USA