MERCEDES C63S / GLC63S AMG M177

The BlackBoost FTA (free to air) adapter converts the factory diverter valve into a blow off valve by redirecting the compressed air from the turbo to be vented to the atmosphere instead of the air being redirected into the air intake. -No Tuning required -No Check Engine Light -Plug and Play Installation -Machined 6 Series Aluminium -Iconic Blow off sound The actuation of the diverter valve depends on manufacturer specification.       Sound Check   ???