CTS Turbo MK1 VW Tiguan and 8U Audi Q3 1.8T/2.0T High-Flow Cat Downpipe (2009-2017)

CTS Turbo is proud to release our downpipe with a 200 cell high flow catalytic converter for MK1  VW Tiguan/8U Q3 1.8T/2.0T.  Each CTS MK1 Tiguan/8U Q3 high-flow cat is 100% tig welded, constructed using 3" T304 Seamless Stainless Steel, and includes installation hardware and stainless steel clamps.  Lesser products can be had without stainless steel construction, or with seamed stainless steel, which can crack and decay over time.  The CTS Turbo Tiguan high-flow cat eliminates the factory downpipe, increases turbo spool up, and peak power.  The increased piping diameter of 3" allows for exhaust gases to exit the turbo and wastegate with less turbulence which all result in more power and torque throughout the entire power-band.  In any turbo vehicle, an upgraded downpipe is a great idea, and this is a particularly potent power adding modification. Precision fabrication, unparalleled quality and great price point all make the CTS MK1 Tiguan 1.8T/2.0T high-flow cat a must-have for any VW enthusiast that values performance and their pocketbook. Product Details:

• 200 cell metallic race catalytic converter
• T304 Seamless Stainless Steel tubing
• T304 Stainless Steel flanges
• 100% TIG Welded
• T304 Stainless Steel 02 bungs
• Stainless Steel Clamps
• Great Sound without adding any drone
• Removable 60mm reducer to fit factory exhaust sleeve clamp

Fitment:

• 2009-2017 VW Tiguan 1.8T/2.0T FWD/AWD
• 2011-2018 Audi Q3 1.8T/2.0T FWD/AWD

Stage 2 software is required to avoid check engine light.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 4 applications

TIGUAN

Make	Model	Engine	Years
VW	TIGUAN		2009–2017
VW	TIGUAN (MK1)		2009–2017

Q3

Make	Model	Engine	Years
AUDI	Q3		2011–2021
AUDI	Q3 (8U)		2011–2021

Fitment data last updated: 2026-06-29