GrimmSpeed Lightweight Crank Pulley Black - Subaru FA/FB Engines (095023) 3517 When considering full-race use on

When considering full-race use on lighter cars

TL4-HDR6 kit features ACT's most popular Heavy Duty pressure plate

the Ferro-Carbon friction material of LTS is the optimal pad choice for light duty trucks

Aggressive Tone

GrimmSpeed Lightweight Crank Pulley Black - Subaru FA/FB Engines (095023) 3517 When considering full-race use onYour 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 (NOT to be confused with functioning as a harmonic dampener,