BMW Downpipes for BMW 4 Series F33 (2014+)

Clear BMW chassis

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 High-Flow Catalytic Converter/Downpipe - N26

For vehicles equipped with an N26 engine

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

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

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Sale - Save 10%

$ 429.99

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

$ 386.99 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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Downpipe To Cat-Back Reducer - Priced Each

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

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

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Sale - Save 25%

$ 39.99

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

$ 29.99 USD

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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

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

Add to Wish List

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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