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Replace the worn-out or broken core of your factory Ferrari catalytic converter(s) with a new high-performance HJS tri-metallic catalytic converter core
Direct bolt-on replacement for the OEM tip outlets with no cutting or welding required
Eliminates faulty O-ring assemblies that are 1940s/ 50s technology
How Tuning Software Improves Vehicle Performance
Laminar flows and volumetric efficiencies have been further enhanced with our unique and innovative internal merge collector area
MillTek Audi RS4 Sport Cat (2019-2021) Tunes & Software Replace the worn-out or brokenOur range of Cast Downpipes offer further enhancements to gas flow and heat management, specifically designed to increase efficiency and performance gains. The HJS High Flow Sport Catalyst is the highest quality and best performing aftermarket Catalyst. The quality of the product is made to reduce the density of OEM Catalysts and be able to maintain emission regulations with daily usage. Standard OEM Catalysts are usually 500 600 cells, our high flow
