Dynojet Jet Kit - Stage 1 - Yamaha 4190

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3:...

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3:...

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3:...

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3:...