64mm Exhaust Cutout Valve Vacuum Controlled - CLOSING

Universal 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

Note: This universal exhaust valve does not have ECE/ABE/parts type approval and is therefore not legal for use on public roads. It is for racing purposes only, where the German Road Traffic Regulations (StVZO) do not apply.

Mode: IF YOU'RE LOOKING FOR A VALVE THAT'S CLOSED WITH BOOST PRESSURE BUT OPEN WITH VACUUM, THEN THIS IS THE RIGHT ONE FOR YOU. The flap is open at idle (vaccum pressure) and with rising pressure, f.e. 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.

Note: The design of the actuator has been improved. The can is now slightly larger in circumference (55mm) and longer (52mm). When the our old stock is sold, you will receive the new design.

Connection diameter: 63,5mm / 2.5"
At vacuum pressure: Open
At applied atmospheric pressure / boost pressure: Closed

For turbocharged vehicles: When you reach boost pressure the valve will open on its own, if you want the valve to stay shut, we recommend installing a vacuum reservoir. (item no: 461525)

Note: For vehicles with diesel engines, the valve needs to be plumbed to the vacuum pump! 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