CTS Turbo B8/B8.5 Audi A4/A5/AllRoad/Q5 1.8T/2.0T Test Pipe

The CTS Turbo B8/B8.5 Audi A4/A5/AllRoad/Q5 1.8T/2.0T Test Pipe is the premier test pipe for your Audi.  Our test pipe is designed to seamlessly fit in place of your restrictive stock catalytic converter, which is situated immediately after the turbocharger.  Our test pipe features 3" stainless steel piping, smooth mandrel bends, two 02 sensor bungs with an option for a third.  Substantial power gains, improved exhaust flow and a more throaty sound are the main benefits of installing our test pipe.  Upon inspection you will notice a flare which is nearly 4", this flare then tapers to 3" and is designed to allow for optimal flow as the exhaust gas transitions from the turbocharger to the test pipe.  In addition to being one of the best bang for the buck performance upgrades for A4/A5/AllRoad and Q5 owners, our test pipe is also a very attractive piece.  Each 3" test pipe is mandrel-bent, hand tig welded.  Do you need an additional 02 bung for data logging?  Well, that's no problem!  Extra O2 bung is now included at no extra charge! Product Details:

• Direct replacement for the factory part
• 304 stainless steel construction
• Mandrel-bent stainless steel
• Fully tig welded design, with reinforced welds at the flanges
• Extra O2 bung for wide-band sensor
• Install hardware included
• Throaty sound
• Great power upgrade

To remove the CEL that will occur, proper tuning software must be used. Use of stage 2 software upgrade is strongly recommended. Fitment for factory turbo, CTS-TR-1070, CTS-TR-1070X and CTS B8 BOSS kits. Fitment:

• 2009 - 2016 Audi A4 2.0T
• 2009 - 2016 Audi A5 2.0T
• 2009 - 2016 Audi AllRoad 2.0T
• 2009 - 2017 Audi Q5 2.0T

• 1.8TFSI EA888 Gen 1 and 2.0TFSI EA888 Gen 2 ONLY!
• Does not fit late ROW cars with EA888 Gen 3 engine.
• Only fits LHD vehicles. Fits manual and automatic transmissions, does not fit CVT.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 8 applications

Q5

Make	Model	Engine	Years
AUDI	Q5		2009–2017
AUDI	Q5 (B8/8.5)		2009–2017

ALLROAD

Make	Model	Engine	Years
AUDI	ALLROAD		2009–2016
AUDI	ALLROAD (B8/8.5)		2009–2016

A4

Make	Model	Engine	Years
AUDI	A4		2009–2016
AUDI	A4 (B8/8.5)		2009–2016

A5

Make	Model	Engine	Years
AUDI	A5		2010–2016
AUDI	A5 (B8/8.5)		2010–2016

Fitment data last updated: 2026-06-28