Mustang 2008 GT, stock exhaust and intake, everything cleaned, new filters, oils, etc. When I accelerate not aggressively, up to a speed of 50-60 km I hear air being sucked in through the intake and a not too loud howl in the cabin. To hear that characteristic V8 sound I have to rev it to 3000 rpm and more. I wonder how to make it so that I can hear the V8 sound in the cabin during normal driving but at the same time not be too loud for people around me, I'm not really interested in being loud, I would like to hear the engine sound better in the cabin. How to do it?