CTS Turbo 2018-2021 Audi S4/S5 (B9) V6T- EA839 Downpipe w/ High-Flow Cat

Designed using the latest in CAD technology; this part is made to fit perfectly in place of restrictive factory catalytic converter. Manufactured from 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 3.0T, the CTS B9 S4/S5 3.0T EA839 high flow cat will make your vehicle sound like an S-car really should. When installed with factory exhaust it produces a sporty growl with much more pronounced exhaust “crackle” on downshift. While up-shifting you will enjoy a confident “braappp!” as you bang through all 8 gears. The sound will be even louder if you already have an aftermarket exhaust system.

Product Details:

• Designed and tested on a real car in the real world
• 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
• Stunning polished finish for great looks

Fitment:

• 2018+ Audi S4 3.oT (EA839)
• 2018+ Audi S5 3.oT (EA839)

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

Download the installation guide: HERE

Brand

CTS Turbo

CTS Turbo is an industry-leading performance parts manufacturer. With over 10 years in VW and Audi performance, CTS has mastered the craft and has expanded across multiple makes, including BMW, Toyota, Mini, Mercedes-Benz, Nissan, and Ford. Their mission is to make horsepower affordable. Offering bolt on solutions for everything from the DIY garage build to the clean room built Dyno queen, and everything in between.