Big Gun 03-06 Yamaha YZ 450F Rev Box Fuel Delivery>Fuel Air Separators NS3-XTG4 kit features an Xtreme

NS3-XTG4 kit features an Xtreme pressure plate for the most demanding driver

Direct Bolt On Replacement For Factory Intake - High Flow Washable Air Filter For Cooler Air Intake - Powder Coated Chrome Finish

the Stealth Fighter Bumper is fully bolt-on and made in the USA

ME3-HDR6 kit features ACT's most popular Heavy Duty pressure plate

Big Gun 03-06 Yamaha YZ 450F Rev Box Fuel Delivery>Fuel Air Separators NS3-XTG4 kit features an XtremeIf you are looking to swap out the 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. Easy direct plug in replacement to stock CDI box Increases overall RPM limit 6 Month Limited Warranty Advanced timing curve