Flaps Off - Exhaust Flap Deactivation
Holds the active exhaust flap valves open for freer flow and a sportier note.
Performance cars often use active exhaust flap valves that stay shut at low load for quiet running and open under load. They let the exhaust be civil around town and louder when the engine is worked.
The factory logic tends to be conservative, so the flaps stay closed more than the exhaust really needs and open less often than they could.
Flaps Off holds the flap valves open through the ECU, so the exhaust flows more freely and takes on a sportier note. There is a small flow and response gain alongside the fuller sound.
It suits cars fitted with a sports exhaust, where the change in character is most noticeable. The map is prepared for your exact ECU and is fully reversible to stock.
Advantages & Features
- Exhaust flap valves held open
- Freer exhaust flow
- Sportier, fuller exhaust note
- Slightly sharper response
- Ideal with a sports exhaust
- Fully reversible to stock
Related solutions
Price
Paid with credits from your account balance. The credit amount for your ECU is shown after the file is analysed, before you confirm. See credit packages
Frequently Asked Questions
What does Flaps Off do?
It keeps the active exhaust flap valves open permanently (or disables their control) for freer flow and a sportier exhaust note.
Which cars have exhaust flaps?
Many BMW, Mercedes-AMG, Audi RS/S, Porsche and VW R models. On some the flap is controlled by a separate module; the analysis tells you where the change is made.
Which file do I need to upload?
A full read of the engine ECU file. Pop & Bang is often selected together with Flaps Off.
How long does Flaps Off take?
Typically 10-45 minutes when prepared by a tuner.
Is Flaps Off reversible?
Yes, by flashing the original file back.
Does Flaps Off affect noise regulations?
The car becomes louder than its type approval. Road-noise rules and inspection are the owner's responsibility; it is intended for track and off-road use.