BMW Downpipes for BMW 4 Series F32 (2014+)

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When BMW began to offer more and more forced induction vehicles, some enthusiasts were upset and others were excited about the big power potential. While we love older, naturally aspirated BMWs, we LOVE forced induction BMWs. Upgrading your downpipe (or downpipes) is one of the easiest ways to reduce restriction and add more power to your BMW. We offer several brands, including our own designs, of downpipes for your BMW!
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CTS Turbo 4" High-Flow Cat - N55 Electronic Wastegate
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTS - Corporate Logo
T#:27472196
Part#: CTS-EXHDP0023CAT
Ships in 7 Business Days
Sale - Save 5% $ 379.99

This product was last offered at the strikethrough price on
06-25-2026

$ 359.99 USD
Free Shipping
Sale - Save 5%
$ 379.99

This product was last offered at the strikethrough price on
06-25-2026

$ 359.99 USD
Free Shipping

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 High-Flow Catalytic Converter/Downpipe - N26
For vehicles equipped with an N26 engine
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CTS - Corporate Logo
T#:27871827
Part#: CTSEXHDP0054CAT
Ships in 7 Business Days
Sale - Save 10% $ 429.99

This product was last offered at the strikethrough price on
06-25-2026

$ 386.99 USD
Free Shipping
Sale - Save 10%
$ 429.99

This product was last offered at the strikethrough price on
06-25-2026

$ 386.99 USD
Free Shipping

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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Downpipe To Cat-Back Reducer - Priced Each
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
ECS - Corporate Logo
T#:22427013
Part#: 006555ECS06B
In Stock
Sale - Save 25% $ 39.99

This product was last offered at the strikethrough price on
06-14-2026

$ 29.99 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 39.99

This product was last offered at the strikethrough price on
06-14-2026

$ 29.99 USD
Free Shipping on orders $49 and up

Upgrade your exhaust system with the Downpipe To Cat-Back Reducer.

Engineered for optimal performance and durability, this reducer allows for seamless connection between your downpipe and cat-back exhaust system. Its high-quality construction ensures a tight seal, reducing exhaust leaks and enhancing overall exhaust flow. With easy installation and compatibility with various exhaust systems, this reducer is a must-have for any performance enthusiast.

  • Allows for seamless connection between downpipe and cat-back exhaust
  • High-quality construction for durability
  • Tight seal reduces exhaust leaks
  • Enhances overall exhaust flow
  • Easy installation and compatibility with various exhaust systems
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034Motorsport Stainless Steel Racing Catalyst/Downpipe
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
034Motorsport - Corporate Logo
T#:26771743
Part#: 034-105-4051
Ships in 2 Business Days
Sale - Save 10% $ 1,158.00

This product was last offered at the strikethrough price on
06-28-2026

$ 1,042.20 USD
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Sale - Save 10%
$ 1,158.00

This product was last offered at the strikethrough price on
06-28-2026

$ 1,042.20 USD
Free Shipping
The 034Motorsport Stainless Steel Racing Catalyst is purpose-built to replace the restrictive factory catalytic converter in BMW F2x/F3x B58 vehicles. With this downpipe installed, drivers can expect significant gains in horsepower and torque throughout the powerband. Additionally, turbocharger lag is reduced, throttle response is improved, and the exhaust note is enhanced for a more aggressive tone. By eliminating the primary bottleneck in the stock exhaust system, this upgrade allows owners to fully unlock the potential of their turbocharged engines.
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Hi-Flow Sports Catted Downpipes - B58
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport - Corporate Logo
T#:591396
Part#: SSXBM1039
Ships in 3 Business Days
Sale - Save 10% $ 2,935.99

This product was last offered at the strikethrough price on
07-01-2026

$ 2,641.51 USD
Free Shipping
Sale - Save 10%
$ 2,935.99

This product was last offered at the strikethrough price on
07-01-2026

$ 2,641.51 USD
Free Shipping
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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Catalytic Converter Installation Kit - B58 3.0L
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:27238750
Part#: 18328612537KT2
In Stock
Sale - Save 1% $ 103.99

This product was last offered at the strikethrough price on
03-10-2026

$ 102.45 USD
Free Shipping on orders $49 and up
Sale - Save 1%
$ 103.99

This product was last offered at the strikethrough price on
03-10-2026

$ 102.45 USD
Free Shipping on orders $49 and up
Prevent engine issues and error codes caused by exhaust leaks with the correct installation of components using appropriate gaskets and hardware.