The For All GMC Dual Catalytic Converter by AltoCars is a high-performance, EPA-certified exhaust system part made of stainless steel. It includes an oxygen sensor for precision and features a bolt-on connection for easy replacement. With a universal fitment design, this catalytic converter is designed to offer 100% accuracy of fit and is manufactured in the United States to ensure quality and performance. Perfect for GMC vehicles, this dual catalytic converter is a reliable choice for improving exhaust efficiency and reducing emissions.