Berk Technology BT1407-HFC-MET Metallic Substrate High Flow Catalytic Converters - Nissan 350Z 07-08 Z33, 370Z 09+ Z34 / Infiniti G35 07-08, G37 09-14, 2015 Q40 Sedan V36 / G37 08-13, Q60 14-15 Coupe CV36 / 14+ Q50 Sedan V37 Metallic Substrate Offers Higher Flow and Lighter Weight. Full Stainless Steel Construction Uses Advanced Spiral Wound Ultra Thin Foil Leak Free Soft Crush Graphite Collector Gaskets Made in the USA