Big Gun Exhaust Rev Box for 2008-12 Yamaha YFM250 Raptor - 40-R19A 2005 Kawasaki KFX700 V-Force Increases fuel economy

Increases fuel economy

2010 Yamaha YFM550FGPH Grizzly FI 4x4 EPS Hunter Edition

2003 Harley-Davidson Softail Heritage Springer - FLSTSI

2009 Ski-Doo Expedition 600 HO TUV Yeti II

Part Number: NX-10027K

Big Gun Exhaust Rev Box for 2008-12 Yamaha YFM250 Raptor - 40-R19A 2005 Kawasaki KFX700 V-Force Increases fuel economyBig Gun Exhaust Rev Box Part Number: 40 R19A Increases overall RPM limit Advanced timing curve Easy direct plug in replacement to stock CDI box 6 month Limited Warranty If you are looking to swap out your stock CDI box, the Big Gun Rev Box is an affordable alternative to highly priced OEM replacement boxes. It increases the overall RPM limit over the stock box and advances the timing curve. The Big Gun Rev Box is offered for various off road MX and