Big Gun Exhaust Rev Box for 2008-12 Yamaha YFM250 Raptor - 40-R19A

Big Gun Exhaust Rev Box

Part Number: 40-R19A

• Increases overall RPM limit
• Advanced timing curve
• Easy direct plug in replacement to stock CDI box
• 6 month Limited Warranty

If you are looking to swap out your stock CDI box, the Big Gun 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. The Big Gun Rev Box is offered for various off-road MX and ATV models.