- Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding
- Aluminum construction and stainless steel Hi-Flo end caps make for the perfect balance of performance and strength
- Removable spark arrestor included
Yamaha -- WR 250 F -- (2012, 2011, 2014, 2013, 2007, 2009, 2010, 2008); Yamaha -- WR 450 F -- (2011, 2010, 2008, 2007, 2009); Yamaha -- YZ 450 F -- (2006, 2007, 2009, 2008); Yamaha -- YZ 250 F -- (2006, 2009, 2008, 2007)