S3 · Power
S3 Downpipe Install Guide
Your S3
Pick your year to see what fits.
This page covers the US S3.
+15–30 whp (est.)
Hard$550–$9503 hrs
Why do it
Frees the turbo.
Tools you'll need
- Jack and 4 jack stands
- Socket set
- Torque wrench
- Penetrating oil
- O2 sensor socket
Starting out? See our budget tool list.
Parts to buy
- CTS Turbo MQB AWD downpipe The same brand as our video.Fits 2015–2020
Doesn't fit your car (0)
Double-check fitment before buying. We may earn a commission when you buy through these links, at no extra cost to you.
Before you start
- Check your local laws before removing a cat.
Steps
Remove the brackets
- Take off the brackets and heat shield.
Pull the old pipe
- Free the lower mount and pry the pipe out.
Fit the new pipe
- Fit the gasket and set the pipe in.
Clamp it
- Tighten the V-band and finish up.
How to know it worked
- No exhaust leaks.
- No check engine light after your tune.
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Safety first
- Park on flat ground, set the parking brake and chock the wheels.
- Never get under a car held up only by a jack. Use jack stands.
- Let the engine and exhaust cool first.
- Disconnect the battery before unplugging electrical parts.
- Wear safety glasses.
- If something doesn't match your car, stop and ask a shop.
Follow your part's instructions and your service manual's torque specs.
Downpipe install guides for other cars