Exhaust Flapper Valve, Stainless Steel – 2.5″ (64mm) Diameter for OE Audi or Mercedes Electric Motor (Motor NOT included)

These Stainless Steel Exhaust Flapper valves are great for utilizing the factory Audi or Mercedes Electric motor systems when building a custom exhaust system w a 3 bolt Pierburg motor (cars like 4.0t Audi S6-S7 and others). They are best located on mufflers with dual outlets on one of the outlets, so when closed by the factory motor your exhaust will be much quieter.

NOTE: These are designed to be welded into your exhaust system by a trained welder and alllow you to bolt on your factory motor on your Mercedes or Audi. Also keep in mind sometimes the open side of the exhaust or muffler when the flap is closed may need some restriction if the system is so large there is not enough back pressure to quiet the car.