GrimmSpeed Black Lightweight Crank Pulley 2015-2021 WRX

DESCRIPTION

The GrimmSpeed Lightweight Crank Pulley reduces the rotational mass of the system, allowing your engine to accelerate and decelerate the rotating assembly more quickly. Your factory crank pulley is responsible for transferring energy from your crankshaft to your water pump, a/c compressor and alternator. It does this by way of a rubber belt and it does it's job well. The drawback to the factory pulley is that it's quite heavy. Reasons for this include less expensive manufacturing and using the pulley's mass to smooth out 'noise' in the accessory system making the GrimmSpeed pulley a perfect upgrade. 

WHY?

The GrimmSpeed Black Lightweight Crank  Pulley fits well, looks beautiful and works exactly as intended. From the first test drive, you'll notice smoother operation, faster response and a more enjoyable drive making this modification a no brainer. 

FEATURES:

• 75% Reduction in Rotating Mass
  

• Machined 6061 T6 Aluminum

• Hard Anodized Finish

• Removal Tool Mounting

• Factory Fitment

COMPATIBILITY

2015-2021 WRX