STILLEN 503430 Hi-Flow Catalytic Converters - 03-06 350Z / 03-07 G35 Coupe / 03-06 G35 Sedan (Pair) Metallic Catalytic Converters - Pair; Stainless Steel Construction - Spun Metallic Core Bolt-On Installation - Flanged for OEM Fitment Performance Increase of 9 whp / 8 lb/ft **Not For Sale In California**