BMW Downpipes for BMW F90 M5 S63 4.4L

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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 Performance Downpipes - High Flow Cats - F90 M5, F91/92/93 ...

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

T#:4333556

Part#: EXHDP0042CAT

Ships in 7 Business Days

Sale - Save 10% $ 1,199.99

This product was last offered at the strikethrough price on
07-10-2026

$ 1,079.99 USD

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Sale - Save 10%

$ 1,199.99

This product was last offered at the strikethrough price on
07-10-2026

$ 1,079.99 USD

Add to Wish List

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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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

Add to Wish List

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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BMW Downpipes for BMW F90 M5 S63 4.4L

CTS Turbo Performance Downpipes - High Flow Cats - F90 M5, F91/92/93 ...

Downpipe To Cat-Back Reducer - Priced Each

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

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