Big Gun 03-06 Yamaha YZ 450F Rev Box

The Big Gun Rev Box for your 2003-2006 Yamaha YZ 450F is designed to raise the stock rev limiter, giving you access to more power higher in the RPM range. It also features an advanced timing curve, which can help improve throttle response and overall engine performance. This is a direct plug-in replacement for your original CDI box, making installation straightforward without needing any special tools or modifications.

Compared to expensive OEM replacement units, the Big Gun Rev Box offers an affordable way to get more out of your YZ 450F's engine. It's a well-built unit that's intended to provide a noticeable difference in how your bike performs, especially when you're pushing it hard. If you're looking to get a bit more out of your machine, this rev box is a solid option.

Please note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's warranty information for details on coverage.