Big Gun Exhaust Mini Rev Box for 2004-08 Yamaha YFM50 Raptor - 40-R21 MPN_18-941 Built with the same Cobra

Built with the same Cobra quality as our square bars

2018 Ski-Doo Renegade 600 E-TEC Enduro

Part Number: 117202

2011 Victory Hammer

2018 Ski-Doo Expedition 900 ACE SE

Big Gun Exhaust Mini Rev Box for 2004-08 Yamaha YFM50 Raptor - 40-R21 MPN_18-941 Built with the same CobraBig 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