so right now i have a 3.5 inch downpipe, 3 inch test pipe and everything else is 2.5 inch and stock muffler all from previuos owner, so i was wondering what kind of exhaust system should i get all the way down, 3.0, 3.5 or wat cause right now im lookin at a 3.0 system all the way down and a 4 inch mufller so what would be best and wat would give off a good sound and good power i have a 1987 supra turbo 5 speed
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