CTS Turbo High-Flow Cats Downpipe Set - BMW F90/F91/F92/F93 S63

Free Shipping


Direct Ship!

Buy Now & Pay over time with

Product Questions & Answers

Product Questions & Answers

Be the first to ask a question!

Ask a Question


CTS Turbo F90 M5/M5C & F91/92/93/ M8 High-Flow Cats are made to maximize exhaust flow for 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 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, our 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 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.


  • 80mm or 3.15″ diameter piping
  • Cat size: 110mm OD x 90mm Long or 4.33″ OD x 3.54″ Long
  • 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

What's Included:

  • CTS Turbo High-Flow Cats

Fitment Details:

  • 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.

Vehicle Fitment

Model   + Drivetrain  
F91 M8 4.4T V8 [S63]
F92 M8 4.4T V8 [S63]
F93 M8 4.4T V8 [S63]
G30 - F90 M5 4.4T V8 [S63] +

Payment & Security

Amazon American Express Apple Pay Diners Club Discover Meta Pay Google Pay Mastercard PayPal Shop Pay Venmo Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Calculate Shipping

You may also like

Recently Viewed