Turner Motorsport G20/G22 M340i/M440i Performance Valved Cat-Back Exhaust

Presenting the Turner Motorsport Performance Cat-Back Exhaust, tailor-made for your M340. Immerse yourself in an enhanced driving adventure as this meticulously engineered exhaust takes your B58-equipped car to exhilarating new heights. With an unwavering commitment to performance and quality, the Turner exhaust is crafted to unlock the full potential of your M340.

Experience a symphony of performance and sound, coupled with a visual upgrade through the quad exit exhaust tips that not only amplify the motorsport essence of the M340 but also replace the stock faux exhaust tips. Elevate your driving encounters with the Turner Motorsport cat-back exhaust - unleash the power, reveal the glorious sound, and capture attention wherever you go.

Incorporating their distinctive design principles, this exhaust produces a commanding, deep tone, revealing the bold personality of the M340. Leveraging the factory valve control, the Turner cat-back ensures an exciting sound during acceleration, seamlessly blending the high-performance sound with daily driving convenience. Crafted from 1.25mm wall T304 stainless steel, Turner's exhaust boasts superior durability, corrosion resistance, and aesthetic appeal.

Designed with the customer in mind, the installation is a breeze, featuring a straightforward bolt-on process using factory slip joints and mounting locations. Your exhaust system includes all the necessary clamps and hardware for a hassle-free installation. Upgrade your M340 with the Turner Motorsport cat-back and let every drive become a statement of power and style.

Upgrading the sound:

This exhaust allows you to turn up the volume and let the B58TU boast its smooth and hearty exhaust tone. Let's be honest, what's the point of owning a B58 if you're not going to upgrade the exhaust? Turner's signature muffler design allows you to transfer the exhaust valve from your factory system directly onto your new Turner system. The Turner exhaust signature muffler design allows for two flow paths that change both tone and volume. With the vehicle in eco or comfort mode, the valves remain closed, with the closed valves the exhaust system allows the gasses to flow through the muffler toning down the volume and giving a more refined exhaust note. While in driving modes sport or sport+ the valve opens and the flow path changes to a "straight flow path" essentially turning into a straight-piped exhaust for the least amount of restriction and the most amount of B58 sound!

Upgraded aesthetics:

From the factory, the G chassis comes equipped with fake or imitation exhaust tips, the Turner exhaust allows you to remove the imitation tips from the vehicle and sport a set of 4 real 3.5" exhaust tips giving that upgraded motorsport styling.

How the cat-back is designed:

To create a cat-back exhaust for this incredible vehicle the upgrade happens right at the downpipe. Turner replaced the factory components with oversized 3.0" T304 stainless steel piping. The true 3.0" exhaust makes its way through the center and rear of the car without the center muffler or resonator to keep the flow to a maximum! With smooth mandrel bent transitions, this exhaust passes perfectly under the rear subframe for a factory equivalent fit. Positioned in the rear of the car is Turner's signature B58 muffler with a beautiful inlet and outlet piping that creates the perfect exhaust tuning. Featuring relief cut slip joints and fabricated sheet metal brackets the exhaust can be fully adjusted and mounted seamlessly in the factory locations. Quad 3.5" exhaust tips are optioned to fill out the open space in the rear diffuser and complete the rear profile of the vehicle.

Sound Clips! Featured on the ECS YouTube Channel:

Features and Benefits:

• Street/Motorsport inspiration
• Controlled by factory valves
• Compatible with factory and aftermarket downpipes (80mm)
• Quad exit with true exhaust tips to replace factory facia
• 19 lb weight savings (Factory - 65lbs, Turner 46lbs)

Kit Contents:

• 3.0" front exhaust section (80mm flange to connect to factory and aftermarket downpipes)
• Full 3.0" lightweight free-flowing midsection for better sound, performance, and weight savings.
• Valved Rear muffler
• Valve extension harness
• Clamps and Hardware for an OEM+ install
• Optional 3.5" Exhaust Tips

Part Design:

• Turner In-house designed and engineered using FARO ARM laser scanning technology and SolidWorks 3D CAD modeling for precision fitment.
• T304 Stainless Material in a natural finish - 1.25mm wall thickness, back purged and TIG-welded throughout
• Full 3.0" Stainless Steel Mandrel Bent Tubing
• T304 Stainless Steel 12mm barbed exhaust hangers Tig-Welded in OE locations for precise fitment.​
• Strategically placed slip joints provide the most adjustability to obtain perfect fitment