ECO series exhaust slip-ons from Big Gun� are for the price-conscious rider that wants to get every ounce of power out of their motor but does not want to break the bank. These slip-ons are handmade in the United States from high-quality 0.049 stainless steel tubing with a 6061 brushed aluminum muffler canister and a design that kept performance, power, sound, and craftsmanship in mind. The ECO series is offered only as slip-ons and is built to the same rigorous standards as the rest of Big Gun's lineup.