PaceSetter Direct-Fit Undercar and Pre-cat Catalytic Converters utilize mandrel-bent, tubular, stainless steel construction. They feature plasma cut, CNC-machined thick steel flanges for a perfect fit every time. All are made in the USA and use EPA-approved catalytic converters and warranty. As of the end of 2016, Pacesetter now manufactures all of the catalytic converters themselves, in-house, enabling us to control the process and quality better as well as pass some of the savings realized back to our customers through lower prices. See our Direct-Fit Manifold Catalytic Converters.