[Jeff H]

Well, in NJ a car is supposed to have exhaust pipes that exit from underneath the vehicle so your car would have failed inspection if it dumps under the vehicle. I had a 68 Camaro SS396 that had dumps and I couldn't stand to drive it. I had tailpipes added and it sounded so much better from inside the car. It made it sound better from outside as well. Dumps cause the exhaust to bounce of the ground and creates almost an echo effect. Better check those local regulations closer or you may end up with a ticket.