I bought a spare muffler.. decided to cut it apart and make a project out of it. I pulled all the glass out of it.. not sure if I want to try it like that, or try to weld solid pipes in place of the perforated pipes.. I figure that is probably what the difference is with the PE..
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13 X1 35iX, 98 Z3 2.8, 01 M Coupe, 96 Z3 1.9 DASC, 95 318ti, 13 smart fortwo