My '33 coupe is similar, lake style headers exiting right at the door line with only a bit of downward tilt makes it "loud" in normal driving, passably "loud" at cruise on the highway with windows down, and bordering on pain at WOT pushing the redline. I've got heat & AC, and even heated seats for Mama, but the AC's only been used a few times (when my wife was along), and I can't recall ever using the driver's side seat heater other than confirming it works. After about three years and >10K miles I'm tiring of the exhaust note a bit, and considering perhaps a second exhaust system tucked underneath and out the back with the ability to swap back & forth without too much hassle. Not sure it will happen, but do know that the Deuce roadster has block hugger headers, and it will have the exhaust all the way back, running some mellow mufflers.