Our 08 Challenger has stock exhaust with the exception of Blastin Bobs resinator kit. I heard a newer Challenger that sounded great. The only markings was the word hemi on the, so I think it was a 5.7. So at the light, I rolled down the window an asked about the exhaust. His replay was that he had Flowmaster 44 exhaust. Anybody have Flowmaster 44 on a 6.1?