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).

IMPORTANT NOTE: All exhaust systems are custom fabricated to order. These are not generic third-party exhausts — our team handles each system in-house, and you’ll be able to see the craftsmanship immediately upon unboxing.

While materials are sourced worldwide, all final metalwork, quality assurance testing, and fitment/mounting verification are completed at our facility in Texas, United States.

Because of the extensive labor involved and the high cost/risk of return shipping exhaust systems, full returns are not accepted. However, if there is ever a verified fitment issue, we will 100% stand by our guarantee and, with proper documentation, make sure you are taken care of.

Please note: once an order is placed, if we are not contacted within 24–48 hours of order placement, cancellations cannot be promised.

Each exhaust unit takes approximately 2–3 weeks for full fabrication. Once fabrication is complete and the system is in quality assurance testing, we will send detailed photos of your exhaust for you to review and approve so you feel fully confident before it ships.

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