Big Gun Exhaust Rev Box CDI Unit for 2004-05 Yamaha YFM660 Raptor - 40-R05C feed-mpn-SRK81 1999 Harley-Davidson FLHTCUI Electra Glide

1999 Harley-Davidson FLHTCUI Electra Glide Ultra Classic

1999 Harley-Davidson FXDLI Dyna Low Rider

Clean appearance is accented with a chrome front trim plate

2012 Honda VFR1200FD DCT

Big Gun Exhaust Rev Box CDI Unit for 2004-05 Yamaha YFM660 Raptor - 40-R05C feed-mpn-SRK81 1999 Harley-Davidson FLHTCUI Electra GlideBig Gun Exhaust Rev Box CDI Unit 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 ATV models.