Big Gun Exhaust Rev Box CDI Unit for 2007 09 Honda TRX300EX FourTrax 40 R18A 1996 Triumph Daytona 1200 2005 Polaris Classic 550 2005 Polaris Classic 550 Street Brake Hose Kits are engineered utilizing a Teflon® inner liner the Big Gun Rev Box is an affordable alternative to highly priced OEM replacement boxes Product Details Product Line Big Gun Exhaust Rev Box CDI Unit Part Number 40 R18A Fitment Type Model Specific Fitment Use Type Unit Sale Qty Each Style Size Position Material Color Finish Functional Length Product Disclaimer Fitment Note This is a perofrmance CDI unit and will modify the RPM curve of your vehicle Fitment Note Fitment Note Fitment Note Fitment Note