Walker 81981 CalCat OBDII Catalytic Converter Legal for sale in the state of California, complies with C.A.R.B. regulations. Stainless steel body with aluminized pipe and heat shields for durability OE-style routing and hanger position for easy installation. Thick OE-style flanges, hangers and brackets for enhanced strength. 5-year/50,000-mile catalytic performance and structural integrity warranty.