Rev Box - Honda XR 400 (99-04)Regular price $175.99
If you are looking to swap out the stock CDI box on your Honda XR 400, 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
- Advanced timing curve
- Easy direct plug in replacement to stock CDI box
- 6 Month Limited Warranty