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Rev Box – Honda TRX 450R (04-05) Hi-Rev


In stock

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.

  • Hi-Rev Over Rev Box increases overall RPM limit – 9,800 to 11,550
  • Advanced timing curve
  • Easy direct plug in replacement to stock CDI box
  • 6 Month Limited Warranty
Big Gun Part #


The Big Gun Rev Box (CDI box) is warranted against manufacturing defect for material and workmanship for six (6) months from date of purchase from date of purchase from Big Gun or from any authorized Big Gun dealer, distributor, or exporter. Any modifications made to the Rev Box i.e. cut wires, soldered wires, excessive water damage, excessive exposure to heat, etc., will void the warranty in its entirety. There is no warranty for improper installation or abnormal use or misuse of the product, and Big Gun is not liable for any potential damage caused to the engine due to improper installation, use, or tuning.