FMF Racing Powercore 4 HEX Aluminum Slip-On Muffler w/Stainless End Cap for Honda CRF250R/CRF250RX 22-24When designing the PowerCore 4 HEX, we looked at our top of the line products to deliver race inspired performance at an economical price. The end result is a quality muffler with improved torque, increased horsepower and rugged durability all at a price that won't break the bank. FEATURES Overall increase in power and torque. Durable stainless steel and aluminum construction. Space Age internal packing material for maximum longevity. Internal shape