Part No. 6107142 Completely redeveloped, THE POWERCORE 4 now features many of the design and engineering features of our top-of-the-line FACTORY 4.1 exhaust - Factory Forward engineering, durable fixed mount, sleek formed endcaps and removable spark arrestor screen. Although manufactured as a price point muffler, we didn't cut corners on material. We utilize aircraft grade aluminium for the canister and new fixed mount. High strength stainless steel is used for the formed front and rear endcaps as well as the mandrel bent midpipe. GAS GAS EC250F'12