AIRTEC Motorsport 3.5” Secondary Cat Bypass for BMW G80 M3 and G82 M4 LAS6-1329P Directly designed for 1st step

Directly designed for 1st step of BMW 35i engine modification

This non-resonated exhaust makes the system louder as it excludes the centre silencer and therefore

Size 80mm Diameter

We recommend installing High Output Ignition Coils with dielectric grease on the spark plugs to ease ignition oil removal

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AIRTEC Motorsport 3.5” Secondary Cat Bypass for BMW G80 M3 and G82 M4 LAS6-1329P Directly designed for 1st stepBy 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 note. Measuring 3. 5 in diameter, this direct replacement mid pipe offers improved flow over standard and comes