When designing the PowerCore 4, FMF looked at their 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 wont break the bank. Overall increase in power and torque. Durable stainless steel and aluminum construction. Space Age internal packing material for maximum longevity. Hi-Flo modular end cap. Internal shape of core uses Hi-Flo technology. Enhanced sonic evacuation provides for higher flow and increased power. Includes removable spark arrestor. Note: For closed course competition use only. NOT intended for street use. Detailed Specifications: Type: Slip-On. Configuration: Single. Construction: Aluminum. Finish: Champagne anodized. Midpipe: Stainless steel. Endcap: Stainless steel. Spark arrestor: Screen insert (included). Quiet insert: Quiet insert (sold separately). Weight: 5.3 pounds. Note: For closed course competition use only. Not intended for street use.
"This pipe rocks put it on my 06 crf250r that came with duel wanted to keep it like that but it was a pain to convert it over with spark arresters to b legal on gov land so I rock power core 4 very happy"