Stainless steel exhaust flap 3,5", 89mm flap control vacuum controlled

If you're looking for individuality, you've come to the right place. With our stainless steel exhaust flaps, you can build your own flap exhaust just the way you want it. Whether loud or quiet, you decide yourself. Features: Inner diameter: 89 mm Outer diameter: 100 mm made of stainless steel adjustable Vacuum controlled the flap is closed with negative pressure and opens with decreasing negative pressure. The function of the flaps is simple: When closed, the exhaust gases are directed through a silencer. As soon as the flap opens, a part goes through, for example, a continuous pipe or silencer replacement. This makes the exhaust louder. The vacuum-controlled flap is closed in the vacuum range and opens as soon as the vacuum decreases or, in the case of turbo engines, goes into overpressure. For example, a hose is laid from the intake manifold to the pressure box of the flap or the flap is alternatively controlled via a remote control or switch. For this purpose, a clock valve is then installed.