your mufler is as big as your smallest bottle neck.. as in your case .. its worthless to have the 3" and then down to 2 1/2 .. creates a lot of turbulence...
James call up Flowmaster to see what they would recommend for a 3" muffler for a 4 cylinder turbocharged car. If whoever you speak with doesn't know what he/she is talking about, ask to speak directly to their R&D Department, that should put you in touch with a man by the name of Kevin McClelland.
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DSMSTYLE MAFIA - Holdin' Down the Cornfields of IA
'92 Laser RS AWD & '01 Grand Prix GTP