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Check StockThe Big Gun Eco Series was designed with a few things in mind, performance, power, sound & craftsmanship. We guarantee that the Eco Series delivers these things all without hurting your wallet. Made for most popular dirtbike models, the Eco Series is made from .049 stainless steel tubing and a 6061 brushed aluminum muffler canister. All Eco Series Exhausts are slip-on systems only.