JDMxDB8
Raceline USA
Well I've seen some people who have fully built NA and FI motors who rock stock mufflers. I don't see anything wrong with people wanting to go with the sleeper look or sound.i still maintain that if you are modding your car for "power purpose" and riding a stock or stock sounding exhaust then you arent a true "loud and proud" enthausiast, and should get out of souping up cars entirely.
i bet if anyone on a harley forum asked about getting more power out of their "stock exhaust" without making it too loud they would be laughed off the board.