DYNOJET Jet Kit - Stage 1/2 - Yamaha 4175

Jet Kit - Stage 1/2 - Yamaha
Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increase, Stage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increase, Increases power and drivability, Fully adjustable