Big Gun Rev Box for 2004-09 Polaris 500 ATV models - 40-R10C 2007 Yamaha YFM700 Grizzly FI 4x4 Auto Size: 21 1/4 Inch

Size: 21 1/4 Inch

Chrome plated filter top with Arlen Ness logo

2005 Yamaha YFM66FAHW Grizzly 660 Hunter Wetland

1981-82 Suzuki GS550

Big Gun Rev Box for 2004-09 Polaris 500 ATV models - 40-R10C 2007 Yamaha YFM700 Grizzly FI 4x4 Auto Size: 21 1/4 InchBig Gun Exhaust Rev Box CDI Part Number: 40 R10C 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