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FMF Racing PowerCore 4 Full System with Stainless Steel Header 41178
FMF Racing 41178 PowerCore 4 Full System with Stainless Steel Header. Race-inspired, price-point muffler made for maximum power output. Aircraft-quality extruded aluminum canister with stainless steel components. Spark arrestor included on S/A models, see footnotes. FMF Racing 41178 PowerCore 4 Full System with Stainless Steel Header Race-inspired, price-point muffler made for maximum power output.