If you are looking to swap out the stock CDI box on your Honda TRX 450R, 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.

• Increases overall RPM limit - 9,800 to 10,800
• Advanced timing curve
• Easy direct plug in replacement to stock CDI box
• 6 Month Limited Warranty