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2018-2019 Yamaha YXF850 Wolverine X4
60" bolt pattern)
High-temp black thermal coated oval shaped aluminum muffler
Lithium Polymer Battery
Powder coated black texture for supreme durability
Big Gun Exhaust TFI Power Box EFI Tuner - 40-R54I Dirt Bike Mufflers & Systems 2018-2019 Yamaha YXF850 Wolverine X4TFI POWER BOX When installing an aftermarket exhaust, proper tuning is a must. The Big Gun Power Box is a plug and play fuel controller that allows you to properly tune your fuel injected motorcycle, ATV or Side x Side in just minutes. Installing a Power Box allows you to get the most out of your aftermarket exhaust and increases throttle response. A Power Box helps cure the lean issue that is run into when installing a higher flowing exhaust and
