Audi
TT RS 8S · 2016 – 2022
Five-cylinder warble, valves locked wide, in the last great TT RS Audi will ever build.
- Fits 8S TT RS coupé and roadster
- Compatible with OEM and Akrapovic valved exhaust
- Cabin fob, no app, no Bluetooth
- Module unplugs in under a minute
Free UK shipping
2-year warranty
Fully reversible
The honest pitch
What this actually does to your TT RS
The 2.5 TFSI in the 8S TT RS is one of the all-time great Audi engines. The exhaust note from the factory is already very good — and the valve map is still tighter than it needs to be.
This pins the flaps open whenever you want the warble. End of story.
Fitment
Audi TT RS 8S
Years
2016 – 2022
Install time
~10 minutes
Tools needed
None
Long read
The Audi TT RS valve story
The 8S TT RS runs the 2.5 TFSI five-cylinder — same engine family as the RS3 — and is widely held to be one of the great-sounding Audi engines of the last fifteen years. The factory exhaust note is already very good. The valve map is still tighter than it needs to be, especially in Comfort mode where the flap stays shut almost permanently.
Open Valve pins the rear flap open. The five-pot warble — that 1-2-4-5-3 firing order — is then present at every RPM in every mode. Decel chatter on overrun above 4,000 is the headline change.
Single actuator, single module. Install via the boot floor on Coupé; Roadster cars require a small extra step due to the soft-top mechanism.
Install — step by step
- 01
Coupé: boot floor up, locate connector behind spare wheel, plug module inline.
- 02
Roadster: rear-bumper-side access via wheel-arch liner.
- 03
Velcro module body to chassis rail.
- 04
Refit trim.
- 05
Pair fob, test.
In the box
- One valve override module (one per actuator)
- Two-button RF key fob (CR2032 pre-installed, spare in the box)
- OEM-pattern connectors — no cutting, no splicing, no scotch-locks
- Printed install card with model-specific photos and a workshop QR link
Fitment notes
- ·8S TT RS Coupé (2016–2022), 8S TT RS Roadster (2016–2022).
- ·Standard TTS and TT 2.0 TFSI use different actuator — not compatible.
- ·Compatible with OEM and Akrapovic valved exhausts.
Audi TT RS — FAQ
Does it work on Coupé and Roadster?+
Yes — both body styles share the same actuator. Install location differs slightly.
What about Akrapovic Sport Performance Exhaust option?+
Yes — Akrapovic systems on the 8S retain the OEM actuator. Same kit.
Will it throw a warning light on the dash?+
No. The module sits in the signal path between the ECU and the actuator motor. The ECU sees a normal actuator response back, so there's nothing to flag. We've shipped thousands of these and not had a single check-engine call linked to the module itself.
Is it reversible?+
Yes, fully. Unplug the module, plug the OEM connectors back into each other, refit the trim — about three minutes' work. There's no permanent change to the car, no part cut, nothing in the ECU. Dealer service visits, MOT, sale to a new owner — pull it out and it's like it was never fitted.
Does it work with an aftermarket exhaust?+
If the aftermarket back-box retains the OEM-pattern valve actuators (most do — Akrapovic, Milltek, IPE, Capristo all run the factory motors), yes. If the system is a straight-through with no valves, there's nothing for the module to override.
Will it interfere with the quattro magnetic-ride suspension?+
No. Magnetic ride reads its own dampers. Unaffected.
Does cold start change?+
No — cat warm-up cycles and cold-start fuelling are managed by the engine ECU. The valve just sits open during cold start instead of cycling. Emissions warm-up is unaffected.
Disclaimer
Open Valve modules are intended for off-road and motorsport use only. Please confirm your car has factory valve-actuated exhaust before ordering — if you're not sure, message us first. Professional installation recommended. Use at your own risk.
