Big Gun BIG ATV SXS Rev Boxes Ignition Controllers - 40-R19A

If you are looking to swap out your stock CDI box, the Big Gun Over 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.

Easy direct plug in replacement to stock CDI box

Big Gun 08-12 Yamaha Raptor 250 Rev Box

Increases overall RPM limit

6 Month Limited Warranty

Advanced timing curve