Go Fast Bits Lightweight Pulley Kit BRZ FR-S T86 Hyundai Your factory crank pulley is

Your factory crank pulley is responsible for transferring energy from your crankshaft to your water pump

These mud flaps have been engineered to perform consistently in a variety of environments

Integrated urethane bump seal insures tight

90% Stiffer)

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Go Fast Bits Lightweight Pulley Kit BRZ FR-S T86 Hyundai Your factory crank pulley isGFB lightweight pulley kits for the Subaru BRZ Scion FR S are made from aircraft grade 6061 T6 aluminum and offer faster acceleration through significant weight reduction on the crankshaft. The effect is similar to a lighter flywheel, and the car feels more lively and willing to rev. Reduction in rotating inertia allows the engine to accelerate throughout the rev range much more efficiently. This allows you to get up into the power band much faster.