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 increaseIncreases power and drivabilityFully adjustable MaterialBrassProduct NameJet KitTypeStage 1UnitsKitVendor part numberQ438 MakeModelDisplacementYearCountryEngineYAMAHAYFZ 450 R 4502012AMERICAYAMAHAYFZ 450 4502012AMERICAYAMAHAYFZ 450 R 4502012EUROPEYAMAHAYFZ 450 4502012EUROPEYAMAHAYFZ 450 4502013AMERICAYAMAHAYFZ 450 R 4502013AMERICAYAMAHAYFZ 450 4502013EUROPEYAMAHAYFZ 450 R 4502013EUROPEYAMAHAYFZ 450 RSE Special Edition4502012AMERICAYAMAHAYFZ 450 RSE Special Edition4502012EUROPEYAMAHAYFZ 450 RSE Special Edition4502013AMERICAYAMAHAYFZ 450 RSE Special Edition4502013EUROPEYAMAHAYAMAHAYAMAHAYAMAHAYAMAHAYAMAHAYAMAHAYAMAHAYAMAHAYAMAHAYAMAHAYAMAHAYFZ 450 R YFZ 450 YFZ 450 R YFZ 450 YFZ 450 YFZ 450 R YFZ 450 YFZ 450 R YFZ 450 RSE Special EditionYFZ 450 RSE Special EditionYFZ 450 RSE Special EditionYFZ 450 RSE Special Edition450450450450450450450450450450450450201220122012201220132013201320132012201220132013AMERICAAMERICAEUROPEEUROPEAMERICAAMERICAEUROPEEUROPEAMERICAEUROPEAMERICAEUROPE