Big Gun Rev Box

Big Gun Exhaust

$83.99 $83.99
Fast Shipping, 60 Day Returns, Great Customer Support


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.
  • Increases overall RPM limit
  • Advanced timing curve
  • Easy direct plug in replacement to stock CDI box
  • CRF/XR 50 (All Years)
  • CRF/XR70 (All Years)
  • CRF/XR 100 (All Years)
  • CRF/XR80 (All Years)

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