Hey Everyone, I'm contemplating getting the Corksport muffler for my CX-5 so the other day I wanted to rev up and listen to my stock exhaust a bit so I had the drivers door open and was playing with the RPM's a bit just to see how she sounded and noticed around just over 2000 RPM a very noticeable engine vibration, you can feel it in the butt for sure, but you can actually see the vibration in the door with it open. Anyone else ever notice this? not sure if it's normal or if I should have Mazda take a look. Feel free to chime in with this, i'll wait a bit before booking it in for service.