Increases overall RPM limit
Advanced timing curve
Easy direct plug in replacement to stock CDI box
6 Month Limited Warranty
Expertly crafted from premium materials
Quality design and workmanship
Durable construction for long service


Rev Box by Big Gun®. 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.

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