Nasty Liberty Walk BMW M4 w, Armytrix OBD2 Valved Exhaust Scream

Armytrix s YouTube channel: Armytrix s website: The company Armytrix has come up with a very loud exhaust available for the BMW M4 F82. In the video you can see it performing a series of loud revs, onboard clips and a dyno run, sounds menacing Armytrix Corp. has established itself as a manufacturer of world class titanium and stainless valvetronic exhaust system for highend performance cars. ARMYTRIX R D team consists of