http://www.odometer.com/car-care/4787/2 ... de#slide/0
many years ago a friend had an old dodge dart. his muffler rusted out and being a rather frugal guy, took a campbells soup can , poked a few holes in it and clamped it on the pipe, then he started up the car and poked some more holes in it until it sounded right and was flowing enough to suit him.
several months later while driving we got pulled over by the cops for a loud car. the cop looked underneath and saw the can, which had by then rusted out.
the cop asked him if there was something better he could do, my friend looked at him and said " maybe a chunky soup can will last longer " the cop started laughing so hard at this he told us to go , without giving a ticket.


