70mm Exhaust Cutout Valve Vacuum controlled - CLOSING | BOOST products
BOOST products

70mm Exhaust Cutout Valve Vacuum controlled - CLOSING


Item number EX-EFC-70

70mm Exhaust Cutout Valve Vacuum Controlled - CLOSING

Premium stainless steel 2.75" exhaust bypass valve, without accessories

High quality exhaust flap for controlling the Sound of exhaust systems / mufflers with 70mm / 2.75 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 specified diameter. This results in the use of exhaust pipes with 1.5mm wall thickness, an edgeless inner diameter transition, which of course makes the welding much easier. The rod thread of the actuator is adjustable for individual requirements.

Connection diameter: 70mm / 2.75"
At vacuum pressure: Open
At applied atmospheric pressure / boost pressure: Closed

Note: For vehicles with diesel engines, the vacuum connection must be connected with the pump to the brake booster! However, this is not allowed in the StVZO, as this is a safety-relevant intervention!

Not road legal in Germany, only possible with §21 technical inspection and report by TÜV / DEKRA