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CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe

CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Test Pipe

CTS TURBO
Availability:
in stock, ready to be shipped
SKU CTS-EXH-TP-0009
$549.99 - $549.99
$549.99
$549.99 - $549.99
$549.99
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We show live inventory for in-stock items. Products may sell out due to high demand but are restocked regularly. Out-of-stock items can still be ordered and usually arrive within a few weeks.

CTS Turbo B9 S4/S5 3.0T (EA839) cat-delete test pipe is made to maximize exhaust flow for highest power gains. Do not compromise performance and sound with factory parts - unleash your B9 S4/S5 3.0T potential! 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 test pipe 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
  • Install hardware included
  • 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 3.0T (EA839)
  • 2018+ Audi S5 3.0T (EA839)
To remove the CEL that will occur, proper tuning software must be used. CTS Turbo recommends choosing a High Flow Cat for the sake of our environment! Use of stage 2 software upgrade is strongly recommended. CEL eliminators or oxygen sensor spacers are ineffective with B9 S4/S5 and will not help. For OFF-ROAD use only.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 4 applications
S4
Make Model Engine Years
AUDI S4 2018–2021
AUDI S4 (B9) 2018–2021
S5
Make Model Engine Years
AUDI S5 2018–2021
AUDI S5 (B9) 2018–2021

Fitment data last updated: 2026-06-30