Universal Catalytic Converters

Complete custom exhaust builds, replace damaged converters on hard-to-find vehicles, and maintain clean emissions with universal catalytic converters. Unlike vehicle-specific direct-fit assemblies, universal catalytic converters feature standardized inlet and outlet diameters designed for custom cutting, fitting, and welding into virtually any exhaust system setup. Over time, factory converters can clog, suffer thermal substrate breakdown, or restrict high-volume exhaust flow—resulting in loss of power, elevated exhaust gas temperatures, and persistent check engine lights.

Upgrading to a high-quality universal catalytic converter provides a cost-effective, adaptable solution for custom street rods, off-road builds, and custom performance exhaust systems. Whether you need a compact body converter to clear tight floor pans or a high-flow metallic substrate converter designed to minimize exhaust backpressure on forced induction and high-horsepower engines, universal units offer maximum fabrication flexibility. Explore EPA-compliant and CARB-compliant (California legal) universal catalytic converters featuring heavy-duty stainless steel outer shells, high-density ceramic or metallic substrates, and integrated heat shields available in 2-inch, 2.25-inch, 2.5-inch, 3-inch, and 3.5-inch weld-in diameters.