Big Gun 99-04 Honda TRX 400EX Rev Box - 40-R01 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... MSRP: Was: Now: $126.99
Big Gun ALL Honda XR/CRF 50/70/80/100 Rev Box - 40-R03 If you are looking to swap out the 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... MSRP: Was: Now: $106.00
