Awaken the B58: Active Autowerke G20 M340i / G22 M440i Valved Axle-Back Exhaust
From the factory, the G-series M340i and M440i are notoriously quiet, leaving the sonorous B58 inline-six feeling a bit muffled. Active Autowerke’s valved rear exhaust is the solution for enthusiasts who want to bridge the gap between "daily driver" and "motorsport-inspired." This axle-back system was engineered to replace the lackluster stock muffler with a high-flow, 304 stainless steel unit that captures a deep, hearty growl worthy of the BMW 'M' badge.
By reusing the factory valve actuator, this system keeps your driving modes functional—providing a refined tone for the commute and a rowdy, unrestricted bark when you’re in the mood to let it rip. It’s the perfect "OEM+" upgrade that delivers the aggressive sound your BMW should have arrived with.
Engineering & Tone
Active Autowerke spent months fine-tuning the resonance of this system to ensure it provides a low-frequency rumble without the high-pitched rasp found in cheaper alternatives.
Valved Versatility: Retains full integration with your factory BMW drive modes (Eco, Comfort, Sport).
High-Flow Design: Maximizes exhaust gas scavenging for improved throttle response and midrange punch.
Aggressive Styling: Available with quad tips to fill out the rear diffuser and provide a menacing track-ready look.
Key Features:
Hand-Built Quality: Fabricated in the USA from premium T304 Stainless Steel.
Precision Fitment: Every unit is test-fitted on a dedicated G-series fixture to guarantee a perfect bolt-on install.
Motorsport-Inspired Sound: Replaces the whisper-quiet factory muffler with a deep, throaty signature note.
All-Inclusive Kit: Includes all necessary clamps and hardware for a straightforward installation.
Specifications:
Material: Mandrel-bent 304 Stainless Steel
Type: Valved Axle-Back (Requires cutting of factory mid-pipe for installation)
Valve Operation: Compatible with OEM BMW actuator
Vehicle Fitment: * 2019+ BMW M340i / M340i xDrive (G20)
2021+ BMW M440i / M440i xDrive (G22/G23/G26)
Awaken the B58: Active Autowerke G20 M340i / G22 M440i Valved Axle-Back Exhaust
From the factory, the G-series M340i and M440i are notoriously quiet, leaving the sonorous B58 inline-six feeling a bit muffled. Active Autowerke’s valved rear exhaust is the solution for enthusiasts who want to bridge the gap between "daily driver" and "motorsport-inspired." This axle-back system was engineered to replace the lackluster stock muffler with a high-flow, 304 stainless steel unit that captures a deep, hearty growl worthy of the BMW 'M' badge.
By reusing the factory valve actuator, this system keeps your driving modes functional—providing a refined tone for the commute and a rowdy, unrestricted bark when you’re in the mood to let it rip. It’s the perfect "OEM+" upgrade that delivers the aggressive sound your BMW should have arrived with.
Engineering & Tone
Active Autowerke spent months fine-tuning the resonance of this system to ensure it provides a low-frequency rumble without the high-pitched rasp found in cheaper alternatives.
Valved Versatility: Retains full integration with your factory BMW drive modes (Eco, Comfort, Sport).
High-Flow Design: Maximizes exhaust gas scavenging for improved throttle response and midrange punch.
Aggressive Styling: Available with quad tips to fill out the rear diffuser and provide a menacing track-ready look.
Key Features:
Hand-Built Quality: Fabricated in the USA from premium T304 Stainless Steel.
Precision Fitment: Every unit is test-fitted on a dedicated G-series fixture to guarantee a perfect bolt-on install.
Motorsport-Inspired Sound: Replaces the whisper-quiet factory muffler with a deep, throaty signature note.
All-Inclusive Kit: Includes all necessary clamps and hardware for a straightforward installation.
Specifications:
Material: Mandrel-bent 304 Stainless Steel
Type: Valved Axle-Back (Requires cutting of factory mid-pipe for installation)
Valve Operation: Compatible with OEM BMW actuator
Vehicle Fitment: * 2019+ BMW M340i / M340i xDrive (G20)
2021+ BMW M440i / M440i xDrive (G22/G23/G26)
Prop 65 Warning
Product Q&A
Lifetime Replacement
This product is not eligible for Lifetime Replacement
Fits These Cars
MAKE
MODEL
SUBMODEL
ENGINE
Special Fitment Notes
BMW
G20
M340i
B58 3.0L
Use vehicle selector to confirm fitment
BMW
G20
M340i xDrive
B58 3.0L
Use vehicle selector to confirm fitment
BMW
G22
M440i
B58 3.0L
Use vehicle selector to confirm fitment
BMW
G22
M440i xDrive
B58 3.0L
Use vehicle selector to confirm fitment
BMW
G23
M440i
B58 3.0L
Use vehicle selector to confirm fitment
BMW
G23
M440i xDrive Convertible
B58 3.0L
Use vehicle selector to confirm fitment
*The above product applications have been written by Turner Motorsport. All
warranties, product application, fitment, and performance are the responsibility of Turner Motorsport.
For additional information see the terms of use.
Prop 65 Warning
