The product is a high-quality catalytic converter designed for all BMW cars. Made with stainless steel, it features a bolt-on connection for easy installation and 100% accuracy of fit. Manufactured in the United States, it is a performance part with OE/OEM Part Number 947820 and Manufacturer Part Number 937501. It is a universal fitment for exhaust systems, certified by EPA, and designed to be durable and easy to replace.