Scope of delivery: - Flap control ø 70mm 2.75" open overpressure controlled exhaust flap stainless steelDescription: - the flap is open and closes in case of overpressure - Inner diameter ø 70mm - Outer diameter ø 81mm - is made of stainless steel - adjustableWe can supply you with inexpensive, high-quality stainless steel flap controls for your exhaust system. These are then used to regulate the volume of the exhaust.The way it works is quite simple:When closed, the exhaust gases are directed through the silencer. As soon as the flap is open, part of the exhaust gas passes through a continuous pipe, making the exhaust louder. The vacuum-controlled flap is closed in the vacuum range, it then opens as soon as the vacuum decreases or, in the case of turbo engines, goes into overpressure. A hose is laid from the intake manifold to the vacuum can of the flap or the flap is controlled via a remote control or switch. A pulse valve is installed in the hose for this purpose.Suitable for: - Exhaust systems with 70mm diameterOptional matching parts: - Remote control for flap control