Hello again something general… I read something about an “Active Exhaust System” when searching the forums today, which was probably installed in 2007 Harleys to meet the EU standards (as far as sound and emission are concerned). http://data.motor-talk.de/…/valve-23377668834731181778.JPG Apparently there is a throttle flap in the Krummer or something My real question is whether to be installed until today if that was already discontinued by Harley Greeting Mike