DYNOJET Jet Kit - Yamaha - WR450F 4150

BILLS EXHAUSTS Verified independent store

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Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modi fied engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3: stock/mild modified engine, stock/modified pipes, individual air filters; driveability may be compromised, N/A for some motors; about a 10-15% power increaseStage 7: race-only, high rpm, not for street useIncreases power and drivabilityFully adjustable Show more