QuadBoss 04-05 Yamaha YFZ450 High-Performance CDI

This QuadBoss High-Performance CDI box is designed to give your 2004-2005 Yamaha YFZ450 a boost in power and overall performance. You get the CDI box itself, which is built with duplication circuits for added reliability. It's a well-built unit that's ready to help you get more out of your engine.

What this CDI box does is alter the ignition advance curves and raise the RPM redline. Specifically, it increases the rev limiter by 1,000 RPM over the stock unit, allowing your engine to rev higher and potentially make more power throughout the entire RPM range. It uses monocurve technology, which is a straightforward approach to ignition timing that helps unleash your ATV's potential.

Keep in mind that this part is not CARB approved and cannot be shipped to California. If you're looking to get more performance out of your YFZ450, this CDI box is a solid option to consider.