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.
"I bought this on Tuesday night. And got it the next day!! Motorsport is by far the best web site to buy from! As in the fmf! I bought this and the power bomb header for my 2005 RMZ 450! Was easy to put on sounded great added power! And looks amazing! Only thing I still need to do is get it re jetted! Great product!"