RENNtech Blow-Off Valve Adapter 4.0L V8 M177 3.0L V6 M276 BiTurbo Engines
Mercedes-Benz C 63/C 63S. To blow off valves, to Allen keys, noise adjustment screws and the pair of blow off valve adapters. 4 gaskets already installed. These blow off valve adapters fit both Mercedes Benz engine models as listed. They were used for approximately 10 minutes as I did not like the loud noise. This particular model has adjustment screws to adjust the noise level.