Spec your kit

S65/S85 Underdrive Pulley Kit

Specifications:

CNC machined 6061 aluminum billet
Anodized in black finish
Optimized diameter for street compromise between power and auxiliary functions.
Reduces parasitic loss on the crankshaft
There are slight variances for the S65 6spd and DCT.
Comes with Continental and Gates accessory belts and installation hardware

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Build Journal: mechanical program

A little something something.

As we waited for parts during the upgrade to the S85-EVO, I decided to test an unoften discussed "free" upgrade.

Some say underdrive pulleys make a difference, others say they didn't feel a thing.

As part of my Special Series, I'll chat on the underdrive pulley theory, the kit I picked and my impressions.

Cheers,
- Matt

Read the series