Big Gun Rev Box is a must have for all Raptor 50s! Adds up to 8-10% more horsepower once snapped in. Comes ready to install and go. Allows RPM to rev out much higher than stock while advancing the timing for a bit more torque on the bottom end. From what we hear the Raptor 50 needs a Big Gun pipe and rev box! Get yours today don't let the competition pass you by! Highly recommended product by the entire Big Gun staff.
Applications:
- 2004 - 2008 Yamaha YFM50 Raptor