BMW G22/G23/G26 M440i Valved Cat-Back Exhaust System – Coupe & Convertible, Gran Coupe (SWB, RWD / xDrive) | Select Quiet or Loud Sound, Premium Performance Upgrade

Transform your driving experience with the BAVMODS® Valved Cat-Back Exhaust System — precision-built for the BMW G22/G23/G26 M440i. Designed to amplify the natural tone of the B58 engine, this system brings out a deeper, sharper, and more dynamic sound that evolves with every throttle input.

With valved sound control, you’re in command of your car’s personality — enjoy quiet refinement on the streets, then open it up for an aggressive, high-performance roar when the road calls for it.

Engineered for Dynamic Sound & Flow

The factory M440i exhaust system restricts tone and exhaust flow, muting the engine’s true character. The BAVMODS® Valved Cat-Back System redefines that balance with a dual-path exhaust design that channels airflow differently depending on valve position.

• Valves Closed: A smoother, resonated path keeps cabin noise subtle — ideal for daily driving or highway cruising.

• Valves Open: The exhaust bypasses the restriction for a raw, exhilarating tone with crisp turbo spool and clean overrun burbles.

Every section is designed for consistent backpressure, maximizing both throttle response and flow efficiency without introducing unwanted drone.

Designed with Precision

Each system is crafted to integrate seamlessly with the M440i’s factory exhaust layout. The geometry, pipe routing, and connection points are developed for a perfect bolt-on fit — no cutting or welding required.

The result is OEM-like alignment with a distinctly more expressive tone, making it the perfect OEM+ upgrade for any M440i build.

Key Features & Benefits

• Dual-Mode Valve Control – Instantly switch between quiet and loud modes with the included valve system.
• Enhanced Flow Design – Improves exhaust velocity for sharper throttle response and power potential.
• Aggressive Yet Refined Tone – Deep, balanced sound under load without interior drone.
• Plug-and-Play Fitment – Direct bolt-on installation using existing mounting points and hardware.
• OEM+ Finish – Clean welds and precision-fit exhaust tips for a factory-plus aesthetic.

Included Components

• Complete valved cat-back exhaust system (mid-pipe + rear section)
• Dual or quad polished tips (depending on variant)
• Valve control module or remote toggle system
• Mounting hardware and clamps

Performance & Sound You Can Feel

The BAVMODS® Valved Cat-Back Exhaust System gives your M440i the power to speak.

Valves closed, it hums with refined confidence; valves open, it delivers a spine-tingling symphony that perfectly matches BMW’s B58 performance DNA.

Expect:

• Quicker turbo response
• Deeper, fuller tone across the RPM range
• Clean overrun burbles in Sport mode
• Smooth, controlled sound for daily comfort

This is the perfect balance of engineering precision and emotion — designed for those who want their M440i to sound as powerful as it performs.

FITMENT: BMW 4 Series – G22/G23/G26 (M440i Models, 2021–Present) including G22 – Coupe (RWD / xDrive), G23 – Convertible (RWD / xDrive), G26 – Gran Coupe (RWD / xDrive).

Crafted from Premium Materials

Each system is built from stainless steel for exceptional corrosion resistance and longevity. Every section is mandrel-bent and TIG-welded to ensure flawless internal smoothness and precise alignment with factory mounting points.

The internal muffler design equalizes backpressure and minimizes turbulence, promoting faster turbo response and consistent power delivery throughout the RPM range.

Key Features & Benefits

• Valved Dual-Mode Sound Control – Instantly switch between quiet cruising and open-valve aggression.
• Mandrel-Bent Stainless Construction – Maximum durability and heat resistance.
• Enhanced Flow Efficiency – Reduces backpressure, improving turbo spool and mid-range torque.
• Aggressive Yet Refined Acoustics – Deep, balanced tone without excessive drone.
• Plug-and-Play Fitment – Direct bolt-on design compatible with stock downpipes and factory mounts.
• Higher Horsepower Potential – Optimized for increased exhaust velocity and reduced restriction.
• OEM+ Finish – Mirror-polished tips and clean welds that complement the rear valence.

Included Components

• Complete valved cat-back exhaust assembly (mid-pipe + rear muffler)
• Dual polished exhaust tips
• Vacuum valve control system (Quiet / Loud toggle switch)
• All required mounting hardware and clamps

Performance & Sound You Can Feel

The BAVMODS® Valved Cat-Back Exhaust System offers the perfect balance between sophistication and performance.

With the valves closed, enjoy a composed factory-like hum; open them, and experience an exhilarating symphony of turbocharged precision.

Expect:

• Sharper throttle response
• Deeper tone under load
• Crisp overrun pops and burbles
• Noticeably freer mid-range pull

It’s the ultimate OEM+ upgrade — purposeful sound, elevated performance, and a factory-fit finish.

FITMENT: BMW 3 Series – G20 / G21 (2019–Present): G20 – Sedan (SWB, RWD & xDrive), G21 – Touring (Wagon, RWD & xDrive) M340i Models.

Please refer to the “Fitment” section in the product description for compatibility details.