2.5" Exhaust Cutout Valve Vacuum controlled - CLOSING

64mm (2.5") Exhaust Cutout Valve Vacuum Controlled - CLOSING Premium stainless steel 2.5" exhaust bypass valve, without accessories High quality exhaust flap for controlling the Sound of exhaust systems / mufflers with 63.5mm / 2.5 inch diameter Mode: If you're looking for a valve that's open at idle, then this is the one for you. The flap is open at idle (vaccum pressure) and with rising pressure, ie opening throttle, or transition to positive pressure in turbocharged engines, shuts the flap. In order to keep the flap permanently open, we have a kit with a check valve and a vacuum reservoir, that must be installed.Our exhaust cutout valves are solid and absolutely accurate working. Attention was paid to stable and precise components. Not like some cheap - flaps, which are offered everywhere. So the bearing of the cutout valve mechanism is made of ceramic and not - as with other flaps - made of plastic, which does not withstand the heat. The housing has a bead, which determines the spe