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CTS BMW Exhaust Parts, Mufflers & Catalytic Converters

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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CTS 3" Stainless Steel Downpipe With High-Flow Cats - F8X S55 ...
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CTS - Corporate Logo
T#:14254799
Part#: EXH-DP-0025-CAT
Ships in 7 Business Days
$ 599.99 USD
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$ 599.99 USD
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CTS Turbo is proud to announce the release of our High-Flow CATS for BMW F80/F82 M3/M4/M2 Competition Our stainless steel high-flow CAT downpipes allow for faster spool, better transient boost response, higher boost, and great sound. Our downpipes are the first part of our modular exhaust system and are compatible with factory mid-pipes and our upcoming CTS Turbo mid-pipes. You should expect strong torque gains when paired with appropriate tuning software. We used CAD simulation to streamline the flow of exhaust gasses and ensure seamless integration with the factory and CTS exhaust components. Many hours of R&D were spent to ensure a perfect fit, smooth exhaust flow, and excellent sound. Use of Bootmod3 software compatible and is strongly recommended. CEL will illuminate if correct software tuning is not used. Features: Large 3″ Durable 304 food-grade stainless steel Laser-cut flanges Factory-like placement of O2 sensors Designed using the latest 3D scanning technology Exhaust flow simulated with CAD software to ensure optimal flow routing Perfect fit with factory or aftermarket mid-pipes Aggressive sound – really makes that S55 scream Fitment: 2015+ BMW S55 M3 (North America) 2015+ BMW S55 M4 (North America) 2018+ BMW S55 M2C (North America) Stage 2 software is required to avoid check engine light.
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CTS Turbo 4" High-Flow Cat - N55 Electronic Wastegate
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T#:27472196
Part#: CTS-EXHDP0023CAT
Ships in 7 Business Days
$ 379.99 USD
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$ 379.99 USD
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Unleash the full potential of your BMW N55 (Electric Wastegate) with the CTS Turbo High-flow Cat, meticulously designed to optimize exhaust flow and deliver unmatched power gains. Bid farewell to factory constraints and welcome superior performance and enhanced sound!

Utilizing advanced CAD technology, this component seamlessly replaces your factory downpipe, ensuring a precise fit. Crafted from robust T304 stainless steel and expertly hand TIG welded with back purging, it ensures long-lasting and dependable performance.

Highlighted Features:

Precision-designed and rigorously tested for peak performance T304 stainless steel construction with TIG welded back-purged joints Direct replacement for the restrictive factory downpipe Substantial power increase without sacrificing performance Creates an exhilarating sporty exhaust sound while maintaining a refined tone during normal driving Eliminates drone typically found with factory exhaust setups Elevate your BMW N55's performance and sound with the CTS Turbo High-flow Cat, engineered for exceptional quality and outstanding performance on the road.

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CTS Turbo High Flow Catted Downpipe
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CTS - Corporate Logo
T#:18932307
Part#: EXH-DP-0037-CAT
Ships in 7 Business Days
$ 429.99 USD
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$ 429.99 USD
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The CTS Turbo High-Flow Cat for the BMW B46 is made to maximize exhaust flow for the highest power gains. Do not compromise performance and sound with factory parts – unleash your BMW’s potential! Designed using the latest in CAD technology; this part is made to fit perfectly in place of your factory downpipe. Manufactured from T304 stainless steel, hand TIG welded and back-purged to ensure years of reliable performance. Product Details: Precisely designed and tested on a real car in the real world T304 stainless steel, TIG welded back-purged construction Replaces restrictive factory downpipe with high-flow 200 cell catalytic converter Great power upgrade with uncompromising performance Incredible sporty exhaust sound, subtle when cruising No drone with factory exhaust The use of stage 2 software is strongly recommended to avoid the CEL from coming on.
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CTS Turbo Performance Downpipes - High Flow Cats - F90 M5, F91/92/93 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTS - Corporate Logo
T#:4333556
Part#: EXHDP0042CAT
Ships in 7 Business Days
$ 1,199.99 USD
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$ 1,199.99 USD
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CTS Turbo High-Flow Cats are made to maximize exhaust flow for the highest power gains. Do not compromise performance and sound with factory parts. Designed using the latest in CAD technology; this part is made to fit perfectly in place of the restrictive factory catalytic converter. Manufactured from CAST T304 stainless steel; hand TIG welded and back-purged to ensure years of reliable performance. In addition to unleashing the power and performance of your 4.4 Twin Turbo, CTS' High-Flow Cats will make your vehicle sound like it really should. When installed with factory exhaust it produces a louder and deeper growl with a much more pronounced exhaust “crackle” on downshift. While up-shifting you will enjoy a confident “punch!” as you bang through all 8 gears. The sound will be even louder if you already have an aftermarket exhaust system. Product Details: Includes 200 cell sport catalytic converter Designed and tested on a real car in the real world Cast T304 stainless steel, TIG welded back-purged construction Replaces restrictive factory catalytic converter Great power upgrade with uncompromising performance Incredible sporty exhaust sound, subtle when cruising No drone with factory exhaust Fitment: 2018-2021 F90 BMW M5 2018-2021 F90 BMW M5 Competition 2020-2021 F91/92/93 M8 To remove the CEL that will occur, proper stage 2 tuning software must be used.
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CTS Turbo Catted Downpipe - A90 Supra
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CTS - Corporate Logo
T#:589512
Part#: CTSEXHDP0024SCAT
Ships in 7 Business Days
$ 459.99 USD
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$ 459.99 USD
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4.5″ High flow catted downpipe that delivers uncompromising performance.
CTS Turbo Performance Downpipes - High Flow Cats - F10 M5/M5C, F06/12...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTS - Corporate Logo
T#:4333555
Part#: EXHDP0034CAT
In Stock
$ 799.00 USD
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$ 799.00 USD
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CTS Turbo High-Flow CATS are made to maximize exhaust flow for the highest power gains. Designed using the latest in CAD technology; this part is made to fit perfectly in place of the restrictive factory catalytic converter. Manufactured from CAST T304 stainless steel; hand TIG welded and back-purged to ensure years of reliable performance. In addition to unleashing the power and performance of your 4.4 Twin Turbo, CTS' High-Flow CATS will make your vehicle sound like it really should. When installed with factory exhaust, it produces a louder and deeper growl with a much more pronounced exhaust “crackle” on downshift. While up-shifting you will enjoy a confident “punch!” as you bang through all 8 gears. The sound will be even louder if you already have an aftermarket exhaust system. Product Details: Designed and tested on a real car in the real world 200 cell catalytic converter Cast T304 stainless steel, TIG welded back-purged construction Replaces restrictive factory catalytic converter Great power upgrade with uncompromising performance Incredible sporty exhaust sound, subtle when cruising No drone with factory exhaust Fitment: 2012-2016 F10 BMW M5 2012-2016 F10 BMW M5 Competition 2012-2016 F06/12/13 M6 2012-2016 F06/12/13 M6 Competition To remove the CEL that will occur, proper stage 2 tuning software must be used.
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F30 335i N55 3.0L CTS Turbo 3.5" High Flow Cat - Pneumatic Wastegate ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTS - Corporate Logo
T#:23053155
Part#: CTS-EXH-DP-0022-
Ships in 7 Business Days
$ 399.99 USD
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$ 399.99 USD
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Enhance your BMW's performance with the CTS Turbo high-flow catalytic converter designed specifically for the BMW N55 (Pneumatic Wastegate) engine. This aftermarket part aims to optimize exhaust flow, delivering significant power gains without compromising performance or sound quality.

  • Precision-designed and real-world tested for optimal performance
  • Constructed from durable T304 stainless steel with hand TIG welding and back purging for reliability
  • Replaces the factory downpipe, reducing restrictions and unlocking greater power
  • Offers a sporty exhaust note, delivering a subdued sound during cruising without excessive drone
  • Requires proper tuning software like Bootmod3 for CEL removal; recommended for OFF-ROAD use only
  • Note: Catalytic converters damaged by "crackle tune" are not covered under warranty.
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CTS Turbo Resonator Delete
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CTS - Corporate Logo
T#:38587657
Part#: CTS-EXH-TP-0020-
In Stock
$ 179.99 USD
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$ 179.99 USD
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Stock exhaust sound improvement

CTS Turbo Performance Downpipes - High Flow Cats - F97 X3 M, F98 X4 M...
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CTS - Corporate Logo
T#:4333554
Part#: EXHDP0043CAT
In Stock
$ 749.99 USD
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$ 749.99 USD
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CTS Turbo High Flow-CATS are made to maximize exhaust flow for the highest power gains. Designed using the latest in CAD technology; this part is made to fit perfectly in place of the restrictive factory catalytic converter. Manufactured from CAST T304 stainless steel; hand TIG welded and back-purged to ensure years of reliable performance. In addition to unleashing the power and performance of your 3.0 Twin Turbo, CTS' High Flow-CATS will make your vehicle sound like it really should. When installed with factory exhaust, it produces a louder and deeper growl with a much more pronounced exhaust “crackle” on downshift. While up-shifting you will enjoy a confident “punch!” as you bang through all 8 gears. The sound will be even louder if you already have an aftermarket exhaust system. Product Details: Designed and tested on a real car in the real world Cast T304 stainless steel, TIG welded back-purged construction 200 Cell High Flow-CATS Great power upgrade with uncompromising performance Incredible sporty exhaust sound, subtle when cruising No drone with factory exhaust Fitment: 2019-2022 G01 BMW X3M 2019-2022 G01 BMW X3M Competition 2019-2022 G02 BMW X4M 2019-2022 G02 BMW X4M Competition To remove the CEL that will occur, proper stage 2 tuning software must be used.
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CTS Turbo Catted Downpipe - All 1/2/3/4/5/6/7 Series B58
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTS - Corporate Logo
T#:589514
Part#: CTSEXHDP0024CAT
Ships in 7 Business Days
$ 459.99 USD
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$ 459.99 USD
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Maximizes exhaust flow for uncompromising performance.
CTS High-Flow Catalytic Converter/Downpipe - N26
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CTS - Corporate Logo
T#:27871827
Part#: CTSEXHDP0054CAT
Ships in 7 Business Days
$ 429.99 USD
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$ 429.99 USD
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The CTS Turbo High-Flow Cat for the BMW BN26 is made to maximize exhaust flow for the highest power gains. Do not compromise performance and sound with factory parts – unleash your BMW’s potential!

Precisely designed and tested on a real car in the real world T304 stainless steel, TIG welded back-purged construction Replaces restrictive factory downpipe with high-flow 200-cell catalytic converter Great power upgrade with uncompromising performance Incredible sporty exhaust sound, subtle when cruising No drone with factory exhaust Designed using the latest in CAD technology; this part is made to fit perfectly in place of your factory downpipe. Manufactured from T304 stainless steel, hand TIG welded and back-purged to ensure years of reliable performance.

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CTS Turbo High Flow Catted Downpipes
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTS - Corporate Logo
T#:18899144
Part#: CTSEXHDP0053CAT
In Stock
$ 899.99 USD
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$ 899.99 USD
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CTS stainless steel downpipes allow for faster spool, better transient boost response, higher boost, and great sound. High-Flow CATS are compatible with factory mid-pipes. You should expect strong torque gains when paired with appropriate tuning software. CAD simulation is used to streamline the flow of exhaust gasses and ensure seamless integration with the factory and CTS exhaust components. Many hours of R&D were spent to ensure a perfect fit, smooth exhaust flow, and excellent sound. Features: Durable 304 food-grade stainless steel Laser-cut flanges Factory-like placement of O2 sensors Designed using the latest 3D scanning technology LHD/RHD fitment Exhaust flow simulated with CAD software to ensure optimal flow routing Perfect fit with factory or aftermarket mid-pipes Aggressive sound – really makes that S58 scream Software tune is required to avoid CEL! Make sure your software is compatible with high flow catted downpipes!
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CTS Turbo Resonator Delete Kit - BMW S58 F97/F98 X3M/X4M
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CTS - Corporate Logo
T#:51075069
Part#: EXH-TP-0026
Ships in 7 Business Days
New Item
$ 299.99 USD
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$ 299.99 USD
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This refined resonator delete kit for the F97 X3M and F98 X4M transforms the factory exhaust into a more aggressive, powerful note that perfectly suits the S58 engine. By replacing the restrictive, hydro-formed stock section with 70mm T304 stainless steel tubing, this upgrade significantly improves exhaust flow and provides a fuller, more assertive sound profile.
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CTS Turbo Midpipe Ugrade - BMW F3X 340/440i B58
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T#:50899211
Part#: EXH-TP-0029
Ships in 7 Business Days
New Item
$ 599.99 USD
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$ 599.99 USD
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The CTS Turbo F-series B58 80mm Midpipe Upgrade is designed to improve exhaust flow, enhance performance, and bring out the signature B58 throaty sound. The factory midpipe is resonated, so CTS developed their high-flow replacement to increase throttle response, sharpen turbo spool, and add a deeper, more refined exhaust tone. This midpipe is made from T304 stainless steel and is a direct bolt-on fit, integrating seamlessly with OEM components for easy noticeable gains in sound and performance. Whether your car is stock or tuned, the CTS B58 Midpipe Upgrade is a must-have to unlock the full character of your F-series BMW.
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CTS Turbo Exhaust Crossover Pipe - G80/82 S58
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CTS - Corporate Logo
T#:51075056
Part#: EXH-TP-0021
Ships in 7 Business Days
New Item
15% off MSRP $ 249.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 212.99 USD
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15% off MSRP
$ 249.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 212.99 USD
Free Shipping
Maximize your BMW G8X S58’s power with the CTS Performance Crossover Pipe. Replace the restrictive factory intermediate pipe with a high-flow design for better exhaust scavenging.

CTS Turbo Crossover Exhaust Pipe For G8X
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CTS - Corporate Logo
T#:24909581
Part#: CTS-EXH-TP-0021
Ships in 7 Business Days
$ 249.99 USD
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$ 249.99 USD
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The left side downpipe on the S58 connects to a "crossover" pipe that runs beneath the transmission and links up with the mid pipes on the left side. Unfortunately, the stock shape of the crossover pipe is oval to create enough clearance underneath the transmission. This alteration from a round tube to an oval causes turbulence within the pipe, leading to a restriction in exhaust flow. CTS Turbo has designed a crossover pipe to eliminate this turbulence that is created by the factory system and ditched the oval design for a round circular design for increased flow and horsepower!
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