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.


Features:

• Increases overall RPM limit
• Advanced timing curve
• Easy direct plug in replacement to stock CDI box
• 6 Month Limited Warranty

Fitment:

• Honda CRF 450R 2004-2007