Airtec - 3.5" Secondary Cat Bypass BMW M3/M4 G8X psm-dynamic CGKA)*Audi A4 B8 Allroad 3

CGKA)*Audi A4 B8 Allroad 3

For 7-speed DSG/S-tronic transmissions only

- Stainless steel sport exhaust centered for L/R system with 2 integrated valves

Our rich line of products includes bumpers

-Audi TTRS (2009-2013)

Airtec - 3.5" Secondary Cat Bypass BMW M3/M4 G8X psm-dynamic CGKA)*Audi A4 B8 Allroad 3Stand out with this incredible Airtec 3. 5" Secondary Cat Bypass for all BMW M3 M4 G8X. (Years: 2019 Present) By replacing the restrictive secondary catalytic converters located in the mid pipe section directly after the downpipes, back pressure is reduced, which effectively improves the engines breathing by allowing it to expel gases more quickly. This in return means faster throttle response, increased power output and a more aggressive exhaust