Unlock serious performance for your 991.2 GT2 RS with these Fabspeed Valvetronic Sport Cats. By replacing the restrictive OEM ceramic 700-cell cats with free-flow HJS 200-cell cores, you significantly reduce back-pressure, improve throttle response, and add a more aggressive exhaust tone — all while maintaining full functionality of your factory PSE valves. This bolt-on upgrade brings meaningful power gains without triggering a check engine light.
Designed for Porsche 911 (991.2) GT2 RS, model years 2018-on
Direct-bolt replacement of the OEM GT2 RS catalytic converters
Retains full compatibility with Porsche’s factory Helical valve system
No ECU tune required for installation — maintains factory emissions monitor (no CEL)
Pair of Valvetronic sport cat assemblies (left + right)
Helical 3.0″ (76 mm) vacuum-actuated Inconel 625 exhaust valves
HJS German-imported 200-cell HD tri-metallic sport catalytic cores
All required clamps, gaskets, and mounting hardware
Installation instructions and Fabspeed lifetime warranty documentation
Material: 14-16 gauge mandrel-bent T304 stainless steel
Catalytic core: HJS 200-cells per inch (cpsi), tri-metallic
Flow: ~92–93% of straight pipe, minimizing restriction
Power gains (per Fabspeed): +20.4 hp and +24 lb-ft torque
Valves: High-temp Inconel 625 aerospace-grade Helical (UK)
High-Flow Catalysts: The large 200-cell HJS cores dramatically reduce restriction for improved flow and power.
Valvetronic Operation: Maintains use of your factory PSE system and exhaust valve control for flexible sound profiles.
No CEL, No Tune Required: Designed to work with your OEM ECU and emissions system without triggering error codes.
Throatier Sound: Offers an enriched, more aggressive exhaust note — while preserving refinement when desired.
Durable Design: Built with premium T304 stainless steel and aerospace-grade valves, engineered for longevity in spirited driving.
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