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yet engineered for outstanding filtration
Adjustment zipper at waist
• Fatb oy trees do not have a designed in provision for the neck lock due to the method of neck stem assembly
interchangeable sliders on the toe
Fits Cams # 1
FMF Racing Powercore 4 Aluminum Slip-On Muffler w/Stainless End Cap for Yamaha YZ450F 03-05/WR450F 03-06 yet engineered for outstanding filtrationFMF PowerCore 4 Slip On Exhaust Yamaha YZ450F 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