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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Milltek Sport Performance Cat Back Exhaust System - BMW G42 M240i xDrive
Milltek Sport Performance Cat Back Exhaust System - BMW G42 M240i xDr...
Milltek Sport - Corporate Logo
T#:26271830
Part#: SSXBM125X
Ships in 5 Business Days
Sale - Save 10% $ 2,855.99

This product was last offered at the strikethrough price on
08-29-2026

Starting at $ 2,570.25 USD
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Sale - Save 10%
$ 2,855.99

This product was last offered at the strikethrough price on
08-29-2026

Starting at $ 2,570.25 USD
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Performance to blow your mind, not your ears! Improve performance and your vehicle's sound with this cat-back exhaust system from Milltek. This cat-back exhaust system features 76.20mm (3.00") T304 stainless steel construction, with quad 100mm (4") exhaust tips available in multiple finishes. With in-house production and engineering in the United Kingdom, they have been designing and developing exhaust systems for over 32 years. This experience has helped put Milltek on the map when it comes to performance exhausts, with offerings that range from Audi/Volkswagen to Porsche, BMW, and even Bentley. But, they don't stop there. Milltek has also made its presence felt in the motorsport community. Through partnerships with various race teams throughout the world, Milltek has gathered feedback on ways to improve their systems from enthusiasts at every level. Constructed of type-304 aircraft grade stainless steel, the quality is top-notch. To take it a step further, Milltek offers a lifetime warranty to the original purchaser.
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Catback Exhaust - Black Tips
Catback Exhaust - Black Tips
Milltek Sport - Corporate Logo
T#:18401896
Part#: SSXBM1224-1
Ships in 5 Business Days
Sale - Save 10% $ 3,083.00

This product was last offered at the strikethrough price on
08-29-2026

$ 2,774.70 USD
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Sale - Save 10%
$ 3,083.00

This product was last offered at the strikethrough price on
08-29-2026

$ 2,774.70 USD
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Milltek Sport Performance Axle Back Exhaust System - BMW G42 M240i xDrive
Milltek Sport Performance Axle Back Exhaust System - BMW G42 M240i xD...
Milltek Sport - Corporate Logo
T#:26271831
Part#: SSXBM121X
Ships in 5 Business Days
Sale - Save 10% $ 2,030.99

This product was last offered at the strikethrough price on
08-29-2026

Starting at $ 1,827.77 USD
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Sale - Save 10%
$ 2,030.99

This product was last offered at the strikethrough price on
08-29-2026

Starting at $ 1,827.77 USD
Add to Wish List
Performance to blow your mind, not your ears! Improve performance and your vehicle's sound with this axle-back exhaust system from Milltek. This axle-back exhaust system features 76.20mm (3.00") T304 stainless steel construction, with quad 100mm (4") exhaust tips available in multiple finishes. With in-house production and engineering in the United Kingdom, they have been designing and developing exhaust systems for over 32 years. This experience has helped put Milltek on the map when it comes to performance exhausts, with offerings that range from Audi/Volkswagen to Porsche, BMW, and even Bentley. But, they don't stop there. Milltek has also made its presence felt in the motorsport community. Through partnerships with various race teams throughout the world, Milltek has gathered feedback on ways to improve their systems from enthusiasts at every level. Constructed of type-304 aircraft grade stainless steel, the quality is top-notch. To take it a step further, Milltek offers a lifetime warranty to the original purchaser handled directly by ECS Tuning.
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G4X BMW M240i Valved Rear Axle-back Exhaust (Black Tips) - G4X M240i
G4X BMW M240i Valved Rear Axle-back Exhaust (Black Tips) - G4X M240i ...
Active Autowerke - Corporate Logo
T#:51285638
Part#: 11-125B
Ships in 3 Business Days
New Item
$ 1,956.00 USD
Free Shipping
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$ 1,956.00 USD
Free Shipping
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For over 40 years, Active Autowerke has been at the forefront of BMW performance, and the G4X M240i axle-back exhaust represents the pinnacle of that development. This system is constructed entirely from TIG-welded 304 stainless steel, offering maximum resistance to corrosion and heat cycles. Unlike universal systems, this exhaust is engineered specifically for the G42 chassis, ensuring that every hanger and flange aligns perfectly. By retaining the factory valve control, this exhaust offers a "no-compromise" solution: it stays quiet and sophisticated when you need it, but opens up for maximum volume and performance when you want it. Each kit is a comprehensive package, providing all hardware required to transform your M240i’s rear section. Key Features: Surgical Precision: Every unit is test-fitted on a dedicated fixture to ensure zero-clearance issues with the chassis or diffuser. Premium Materials: Full 304 Stainless Steel construction ensures a lifetime of performance. OEM Integration: No need for extra wiring or controllers; works seamlessly with your car's computer. Aggressive Rear Stance: Fills the rear bumper cutouts more effectively than the stock rectangular tips. Performance Gains: Improved exhaust scavenging contributes to a more responsive B58 engine. Specifications: Type: Valved Rear Axle-back Exhaust Section SKU: 11-125 Finish: Brushed Stainless (Standard) Hardware: Includes all high-grade connecting hardware Vehicle Fitment: * 2022+ BMW M240i / M240i xDrive (G42 Chassis) Custom Options: Available in multiple tip finishes to match your specific trim package
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G4X BMW M240i Valved Rear Axle-back Exhaust (Brushed Tips) - G4X M240i
G4X BMW M240i Valved Rear Axle-back Exhaust (Brushed Tips) - G4X M240...
Active Autowerke - Corporate Logo
T#:51285636
Part#: 11-125
Ships in 3 Business Days
New Item
$ 1,899.00 USD
Free Shipping
Add to Wish List
$ 1,899.00 USD
Free Shipping
Add to Wish List
For over 40 years, Active Autowerke has been at the forefront of BMW performance, and the G4X M240i axle-back exhaust represents the pinnacle of that development. This system is constructed entirely from TIG-welded 304 stainless steel, offering maximum resistance to corrosion and heat cycles. Unlike universal systems, this exhaust is engineered specifically for the G42 chassis, ensuring that every hanger and flange aligns perfectly. By retaining the factory valve control, this exhaust offers a "no-compromise" solution: it stays quiet and sophisticated when you need it, but opens up for maximum volume and performance when you want it. Each kit is a comprehensive package, providing all hardware required to transform your M240i’s rear section. Key Features: Surgical Precision: Every unit is test-fitted on a dedicated fixture to ensure zero-clearance issues with the chassis or diffuser. Premium Materials: Full 304 Stainless Steel construction ensures a lifetime of performance. OEM Integration: No need for extra wiring or controllers; works seamlessly with your car's computer. Aggressive Rear Stance: Fills the rear bumper cutouts more effectively than the stock rectangular tips. Performance Gains: Improved exhaust scavenging contributes to a more responsive B58 engine. Specifications: Type: Valved Rear Axle-back Exhaust Section SKU: 11-125 Finish: Brushed Stainless (Standard) Hardware: Includes all high-grade connecting hardware Vehicle Fitment: * 2022+ BMW M240i / M240i xDrive (G42 Chassis) Custom Options: Available in multiple tip finishes to match your specific trim package
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G4X BMW M240i Valved Rear Axle-back Exhaust (Carbon Tips) - G4X M240i
G4X BMW M240i Valved Rear Axle-back Exhaust (Carbon Tips) - G4X M240i...
Active Autowerke - Corporate Logo
T#:51285642
Part#: 11-125C
Ships in 3 Business Days
New Item
$ 2,374.00 USD
Free Shipping
Add to Wish List
$ 2,374.00 USD
Free Shipping
Add to Wish List
For over 40 years, Active Autowerke has been at the forefront of BMW performance, and the G4X M240i axle-back exhaust represents the pinnacle of that development. This system is constructed entirely from TIG-welded 304 stainless steel, offering maximum resistance to corrosion and heat cycles. Unlike universal systems, this exhaust is engineered specifically for the G42 chassis, ensuring that every hanger and flange aligns perfectly. By retaining the factory valve control, this exhaust offers a "no-compromise" solution: it stays quiet and sophisticated when you need it, but opens up for maximum volume and performance when you want it. Each kit is a comprehensive package, providing all hardware required to transform your M240i’s rear section. Key Features: Surgical Precision: Every unit is test-fitted on a dedicated fixture to ensure zero-clearance issues with the chassis or diffuser. Premium Materials: Full 304 Stainless Steel construction ensures a lifetime of performance. OEM Integration: No need for extra wiring or controllers; works seamlessly with your car's computer. Aggressive Rear Stance: Fills the rear bumper cutouts more effectively than the stock rectangular tips. Performance Gains: Improved exhaust scavenging contributes to a more responsive B58 engine. Specifications: Type: Valved Rear Axle-back Exhaust Section SKU: 11-125 Finish: Brushed Stainless (Standard) Hardware: Includes all high-grade connecting hardware Vehicle Fitment: * 2022+ BMW M240i / M240i xDrive (G42 Chassis) Custom Options: Available in multiple tip finishes to match your specific trim package
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Active Autowerke G4X BMW M240i Valved Rear Axle-back Exhaust (Carbon Over Black Chrome Tips) - G4X M240i
Active Autowerke G4X BMW M240i Valved Rear Axle-back Exhaust (Carbon ...
Active Autowerke - Corporate Logo
T#:51285645
Part#: 11-125CB
Ships in 3 Business Days
New Item
$ 2,469.00 USD
Free Shipping
Add to Wish List
$ 2,469.00 USD
Free Shipping
Add to Wish List
For over 40 years, Active Autowerke has been at the forefront of BMW performance, and the G4X M240i axle-back exhaust represents the pinnacle of that development. This system is constructed entirely from TIG-welded 304 stainless steel, offering maximum resistance to corrosion and heat cycles. Unlike universal systems, this exhaust is engineered specifically for the G42 chassis, ensuring that every hanger and flange aligns perfectly. By retaining the factory valve control, this exhaust offers a "no-compromise" solution: it stays quiet and sophisticated when you need it, but opens up for maximum volume and performance when you want it. Each kit is a comprehensive package, providing all hardware required to transform your M240i’s rear section. Key Features: Surgical Precision: Every unit is test-fitted on a dedicated fixture to ensure zero-clearance issues with the chassis or diffuser. Premium Materials: Full 304 Stainless Steel construction ensures a lifetime of performance. OEM Integration: No need for extra wiring or controllers; works seamlessly with your car's computer. Aggressive Rear Stance: Fills the rear bumper cutouts more effectively than the stock rectangular tips. Performance Gains: Improved exhaust scavenging contributes to a more responsive B58 engine. Specifications: Type: Valved Rear Axle-back Exhaust Section SKU: 11-125 Finish: Brushed Stainless (Standard) Hardware: Includes all high-grade connecting hardware Vehicle Fitment: * 2022+ BMW M240i / M240i xDrive (G42 Chassis) Custom Options: Available in multiple tip finishes to match your specific trim package
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Active Valve Control
Active Valve Control
Milltek Sport - Corporate Logo
T#:35391006
Part#: SSXBM1275
Special Order: No Guaranteed ETA
Sale - Save 10% $ 549.99

This product was last offered at the strikethrough price on
08-29-2026

$ 494.98 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 10%
$ 549.99

This product was last offered at the strikethrough price on
08-29-2026

$ 494.98 USD
Free Shipping on orders $49 and up
Add to Wish List
Milltek Sport's Active Valve Control (AVC) offers advanced exhaust management for vehicles with factory-installed valves and Milltek's performance exhaust systems with valve control upgrades. Seamlessly integrated, AVC allows drivers to control the opening and closing of the exhaust valves, enabling precise adjustments to both sound and volume to suit their preferences. For select models, AVC features optional app control through iPhone or Android devices, providing convenient customization at the driver’s fingertips. With full CAN BUS integration and built-in safety features, the system guarantees reliable performance while giving complete control over the exhaust’s acoustic output.
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Turner Motorsport Double Wall Slash Cut Exhaust Tips - 2.75 Inlet - 3.5 OD - Stepped Left And Stepped Right- Titanium Black Chrome
Turner Motorsport Double Wall Slash Cut Exhaust Tips - 2.75 Inlet - 3...
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:55857771
Part#: 026732TMS03KTKT2
Ships on Oct 29, 2026
New Item
$ 279.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 279.99 USD
Free Shipping on orders $49 and up
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