Active Autowerke Mid-Pipe w/ Active Brace – BMW M340i / M440i (G2X / G3X, B58)

OVERVIEW

The Active Autowerke mid-pipe deletes the resonator in the Y-section of the factory mid-pipe on the G-chassis M340i and M440i, opening up a deeper tone. It is built from 304 stainless steel in the USA and ships with an Active Autowerke chassis brace (the G2X brace on 2024-and-older cars, the Active brace on 2025+ cars), which restores chassis rigidity while adding clearance for the larger piping.

SPECS

• Resonator-delete mid-pipe section
• 304 stainless steel, made in the USA
• Each unit test-fit on Active Autowerke's M340i / M440i exhaust fixture
• Includes the matching chassis brace: G2X brace (2024 and older variant) or Active brace (2025+ variant)
• Not a catalytic component; not valved

PARTS INCLUDED

• Mid-pipe section
• Chassis brace (G2X brace for 2024 and older; Active brace for 2025+)
• All connecting and installation hardware

TECH RESOURCES

Additional Parts Required

• None. The brace and connecting hardware are included. Installing the mid-pipe alone requires cutting the factory system; no cutting is needed when paired with the Active Autowerke rear axle-back.
• Optional: pair with the Active Autowerke Valved Rear Axle-Back Exhaust (M340i / M440i).

Installation

• Professional installation recommended.
• Request an Install Appointment

Notes

• Select the variant that matches your model year: 2024 and older w G2X brace (11-128) or 2025+ w Active Brace (11-128N).
• Does not fit the M440i Gran Coupe (G26).

PART NUMBER

• 11-128 — 2024 and older w G2X brace
• 11-128N — 2025+ w Active Brace

VEHICLE APPLICATIONS