Go Fast Bits Lightweight Aluminum Water Pump Pulley- 13+ Subaru BRZ & Scion FR-S
Made from aircraft-grade 6061-T6 aluminium, Go Fast Bits lightweight pulley kits offer faster acceleration through significant weight reduction on the crankshaft. The concept is similar to a lightweight flywheel, which makes the engine more willing to rev.
Most of GFB's kits are underdriven, which means the accessories are driven slightly slower to reduce parasitic losses. It should be noted that their underdrive pulley kits do NOT adversely affect the operation of the accessories.
Factory Water pump pulley: 1lb
Go Fast Bits water pump pulley: .53 lbs
Fits 13+ Subaru BRZ & Scion FR-S