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Fabspeed Audi SQ8 Sport Catalytic Converters (2020+) - FS.AUD.SQ8.SC Porsche 992 Turbo SOUL Competition STOCK SUCKS: No doubt theFabspeed Audi SQ8 Sport Catalytic Converters replace the restrictive factory cats with high performance German imported 200 cell HJS catalytic converters for significantly improved performance and sound. HJS Sport Cats are extremely efficient in terms of air flow, flowing at 93 95% the rate of a straight pipe. We use HJS catalysts to ensure durability and longevity for the life of the product while eliminating and chance of a check engine light.