BMW Exhaust Parts, Mufflers & Catalytic Converters for BMW G42 M240i xDrive B58 3.0L

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Performance exhaust options from the best BMW aftermarket producers and the most reliable replacement maintenance parts are all at Turner Motorsport. Over time, factory exhaust on the cleanest examples of BMW heritage shows their age. Our factory replacement exhausts are just what you need to keep your favorite car in showroom condition or finish off your restoration. If you are looking for a bump in sound and power, you can also find our performance options like Headers, Downpipes, and Mufflers from Corsa, DINAN, and others on this page.

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Enthusiast Bundles - Corporate Logo
T#:37419762
Part#: 039018LAEBKT
In Stock
Sale - Save 25% $ 2,261.97

This product was last offered at the strikethrough price on
05-05-2026

$ 1,699.99 USD
Sale - Save 25%
$ 2,261.97

This product was last offered at the strikethrough price on
05-05-2026

$ 1,699.99 USD

G42 M240 Performance Valved Cat-Back Exhaust

Unleash the true potential of your M240 with Turner Motorsport’s precision-engineered Cat-Back Exhaust, designed specifically for the B58 engine. From sound and style to pure performance, this exhaust system transforms your driving experience with an exhilarating soundtrack and unmistakable visual flair.

Engineered for performance, this exhaust system replaces the M240’s stock faux exhaust tips with striking quad 3.5" real tips. Made from premium 1.25mm T304 stainless steel, this cat-back exhaust offers superior durability, corrosion resistance, and a sleek look. Integrated valve control lets you adjust the exhaust tone to suit your driving mode, creating a refined, balanced note in comfort mode and an aggressive roar in sport mode. Turner’s unique muffler design maximizes flow when the valve is open, delivering pure, unrestrained sound and performance on demand.

Key Exhaust Features:

Authentic Quad Tips: Upgrade from the stock imitation tips to real, polished quad tips that bring motorsport aesthetics to your M240. Valve-Controlled Sound: The factory valve control allows for sound customization—subtle in comfort mode, powerful in sport mode. Durable Construction: Built from high-grade T304 stainless steel for maximum durability and resistance to the elements. Optimized Flow Design: True 3.0" piping from the downpipe to the muffler, designed without a resonator to keep exhaust flow unrestricted. Performance You Can Feel

Every aspect of the Turner cat-back exhaust is built with the driver in mind. The mandrel-bent, stainless steel piping ensures smooth airflow, while the strategically placed slip joints provide the perfect alignment and adjustability for a seamless, factory-like fit. The result? An unmistakable exhaust note and a substantial power boost.

What’s Included:

3.0" front exhaust section compatible with factory or aftermarket downpipes Lightweight, free-flowing midsection for maximum sound and performance gains Valved rear muffler for adjustable sound profiles Quad 3.5" optional exhaust tips for an aggressive rear profile Valve extension harness and all clamps/hardware for easy, bolt-on installation G42 M240i Aluminum Skid Plate

BMW’s newer high-powered engines, like the B58 and S58, require efficient cooling—but space constraints mean the oil cooler sits dangerously low and exposed. Protect this crucial component with Turner Motorsport’s heavy-duty skid plate. Constructed from 3/16" thick 5052 aluminum, this skid plate shields your oil cooler from debris and road impacts that could lead to severe engine damage. Unlike the factory plastic belly pan, Turner’s skid plate offers unmatched protection without compromising weight, aerodynamics, or cooling efficiency.

Designed to deflect debris while preserving airflow, this skid plate includes flared air channels to maintain cooling performance. It installs easily with factory hardware—no drilling or modification needed—and features a sleek black powder coat finish that’s both durable and stylish.

Skid Plate Benefits:

Enhanced Protection: Protects against rocks, debris, and other hazards that could damage your oil cooler. Factory-Compatible Installation: Bolts directly onto your car with no modification needed. Aerodynamic Design: Preserves factory aerodynamics with cooling vents for optimal airflow to the oil cooler. Durable Construction: Made from 5052 aluminum with a black powder-coated finish for superior strength and longevity. Equip your M240 with Turner Motorsport’s Cat-Back Exhaust and Aluminum Skid Plate and experience a new level of performance and protection—your BMW deserves nothing less!

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Bav Auto Oxygen Sensor Tool - Angled Handle - 7/8"
10X Entries Into Our F80 M3 Sweepstakes
Bav Auto Tools - Corporate Logo
T#:580382
Part#: B8800066
Ships in 1 Business Day
Sale - Save 25% $ 49.99

This product was last offered at the strikethrough price on
05-03-2026

$ 37.49 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 49.99

This product was last offered at the strikethrough price on
05-03-2026

$ 37.49 USD
Free Shipping on orders $49 and up
Slotted, pivoting head has both hexagon and double hexagon drive. Angled handle reaches around obstructions. Fits all Oxygen sensors with 7/8in (22mm) hex.
Bav Auto Tools - Corporate Logo
T#:580383
Part#: B8800067
Ships in 1 Business Day
Sale - Save 20% $ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.99 USD
Free Shipping on orders $49 and up
This 1/2" Drive, 7/8" x 6" Extra Long O2 sensor tool is used to remove difficult to reach oxygen sensors.

Akrapovic - Corporate Logo
T#:37993401
Part#: P-HF1452
In Stock at Vendor
$ 610.99 USD
Free Shipping on orders $49 and up

Akrapovič Sound Kit for BMW G42 Exhaust

The Akrapovič Sound Kit for BMW G42 Exhaust revolutionizes the driving experience by offering complete control over your exhaust sound. Designed specifically for select Akrapovič exhaust systems, this cutting-edge kit allows drivers to switch between a refined quiet mode and an exhilarating sporty sound with ease. Integrated with Akrapovič's advanced technology, the kit includes a receiver to operate the actuators that manage the exhaust valves. Control is at your fingertips with the Sound Remote Controller or the Akrapovič smartphone app, available for both iOS and Android.

Key Benefits:

  • Customizable exhaust sound to match your driving preferences
  • Seamless switching between quiet and sporty modes
  • Compatible with select Akrapovič exhaust systems for BMW G42
  • Integrated receiver for easy evolution system compatibility
  • Control via Sound Remote Controller or Akrapovič app
  • Elevates the sporty appeal of your BMW G42

Transform your BMW G42 with the Akrapovič Sound Kit and experience a driving experience that is as unique as you are.

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Akrapovic - Corporate Logo
T#:18037013
Part#: S-BM/T/32H
In Stock at Vendor
$ 7,036.99 USD
$ 7,036.99 USD
FITMENT NOTE: An extra stock valve actuator (BMW # 18308686640) is needed when installing the Slip-On exhaust system on BMW M240i (G42). Offering noticeable weight savings, increased power and torque, and a dramatic soundtrack, this system is constructed from lightweight high-grade titanium and completed with hand-crafted carbon-fiber tailpipes. Power and torque are increased by 7.1 Kw (9.7 hp) at 2,450 rpm and 20.5 Nm at 2,450 rpm when tested on the Akrapovič dyno against a BMW M240i with a standard stock exhaust. An exhilarating soundtrack is delivered through the use of special parts fitted into the system. Two valves – instead of one, as in the stock configuration – are calibrated to tailor the sound, and two acoustic reflectors are fitted on the tailpipes to guide the sound into the car’s cabin and change the driving experience, producing a fully immersive sound in the car’s cockpit, to supply thrills and enjoyment that can be enjoyed by all occupants. Because the Akrapovič Slip-On Line (Titanium) exhaust system has two valves, one more than the stock configuration, a TNG controller is included in the product to activate the additional exhaust valve. Two resonators, one on each side of the central muffler, perfect the sound experience.
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