CTS Turbo MQB VW Tiguan and Audi Q3 AWD 1.8T/2.0T High-Flow Cat

We are proud to release the new CTS Turbo 3.5" Stainless Steel downpipe with High Flow Cat for the MK2 VW Tiguan/Audi Q3 (new) AWD 1.8T/2.0T High-Flow Cat.  Unfortunately, the factory downpipe that comes as standard equipment in your car was designed for anything but performance.  The factory downpipe severely restricts exhaust flow and therefore has adverse effects on horsepower, especially once your car is "chipped".  The CTS Turbo High-Flow Cat will allow for your exhaust gases to flow smoothly, freeing up the additional ponies that you want, all while looking amazing.  Highlights of our downpipe include CNC machined turbine discharge (downpipe) flange, mandrel bent 3.5" to 3.0" stainless steel tubing, modular design making installation of a catalytic converter simple and straight forward, smooth transitions allowing for optimal exhaust gas flow. Precision fabrication, unparalleled quality and great price point all make the CTS Turbo MK2 AWD Tiguan High-Flow Cat a must have for any VW enthusiast that values performance and their pocketbook. Product Details: -T304 Seamless Stainless Steel tubing -T304 Stainless Steel flanges -100% TIG Welded -T304 Stainless Steel 02 bung -Torca Accuseal Stainless Steel Clamps -Great Sound even with factory exhaust, no drone!! Fitment:

• 2017 - current VW Tiguan 1.8T/2.0T 4-motion AWD (MQB)
• 2019 - current Audi Q3 1.8T/2.0T 4-motion AWD (MQB)

Note: 184hp engines require a 60mm reducer to connect to factory exhaust. Check on your vehicle and select from drop-down menu. To ensure the best performance and operation, proper tuning software must be used (Stage 2 software from most large tuning companies is compatible). CTS Turbo recommends choosing a High Flow Cat for the sake of our environment! Using the optional CEL eliminator greatly reduces the possibility of CEL coming on for cat efficiency code. We recommend disabling your Soundaktor (noise amplifier) to fully enjoy the true sound of your motor and remove excessive drone caused by the device. 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		2018–2021
VW	TIGUAN (MK2)		2018–2021

Q3

Make	Model	Engine	Years
AUDI	Q3		2019–2021
AUDI	Q3 (8U)		2019–2021

Fitment data last updated: 2026-09-14

✓ Fits 4 vehicle applications Check vehicle fitment before ordering View fitment