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Porsche 911 GT3 Cup Factory/OEM Catalytic Converter Re-Coring Style:Default Inject new life into yourReplace the worn out or broken core of your factory Porsche Cup Car catalytic converter(s) with a new high performance HJS tri metallic catalytic converter core. FEATURES: Fabspeed Motorsport can replace the inner core of your Porsche Cup Car catalysts with new high performance cores from HJS Germany. These premium catalytic converters are a fantastic way to refresh your factory exhaust system without sacrificing the factory appearance. Please call us