Big Gun Exhaust Mini Rev Box for 2004-08 Yamaha YFM50 Raptor - 40-R21 MPN_18-941 2011 Victory Hammer

2011 Victory Hammer

2006 Suzuki DR-Z400ES

1997 Harley-Davidson Road King - FLHR models

Built with the same Cobra quality as our square bars

Big Gun Exhaust Mini Rev Box for 2004-08 Yamaha YFM50 Raptor - 40-R21 MPN_18-941 2011 Victory HammerBig Gun Exhaust Mini Rev Box Part Number: 40 R21 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 offroad MX and