Are you planning on keeping the stock turbo or upgrading to a larger one (20g, 50 trim, T4, etc)? If you are going to stay in the 16g range, you will be fine with a 2.5" exhaust. If you plan on going larger, go with a 3" exhaust. If you get a pressbent exhaust, 3" is about the equivilance of 2.5" mandrel. Most people go with Buschur for 1gs and N1 for 2gs.
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97 Viper GTS
03 Mercedes CLK500 rollin on dubs...
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