Walker 15571 California Emissions Compliant Pre-OBDII Domestic Converter Designed for use on Pre-OBDII vehicles. (1995 and older) Flange to flange, direct fit design bolts to existing exhaust Features ample precious metal load & proprietary washcoat technology Stainless steel body with aluminized pipe and heat shields for durability Thick OE-style flanges, hangers and brackets for enhanced strength.