CTS Turbo CTS Turbo BMW F90 M5/M5C & BMW G15/G16 M8/M8C HIGH-FLOW CATS DOWNPIPES 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 parts. 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.

Product Details:

• 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 parts
• Great power upgrade with uncompromising performance
• Incredible sporty exhaust sound, subtle when cruising
• No drone with factory exhaust

Fitment for M cars only with S63 engine:

• 2018-2024 F90 BMW M5 (Including Competition Models)
• 2019-2024 G15/G16 M8 Coupe, Convertible & Gran Coupe (Including Competition Models)

To remove the CEL that will occur, proper stage 2 tuning software must be used.