FMF PowerCore 4 Slip-On Exhaust Yamaha YZ450F / YZ250F 2006-2009 / WR250F 2007-2013 / WR450F 2007-2011

FMF PowerCore 4 Slip-On Exhaust Yamaha YZ250F / YZ450F / WR250F / WR450F When designing the PowerCore 4 Exhaust, FMF took a hard look at their top of the line mufflers to produce race-inspired performance at a more economical price. The end result is a quality muffler that delivers improved torque, increased horsepower and rugged durability all at a price that won't break the bank. Features: Increase in power and torque through entire RPM range Durable stainless steel and aluminum construction High quality internal packing material for maximum longevity Removable spark arrestor included Can be used with FMF or Stock OEM Header Weight: 5.4 lbs 100% made in the USA