You have a GTP. Get the 3".
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Flowmaster's on these cars (GTP) are not beneficial... My 97 sounded lousy and raspy. They also flow horrible... They help on low end only. My cars best top end performance was when I had nothing but a glasspack in place of a resonator... I hated it though cause it sounded like a cessna taking off... I will be putting Corsa on my '04...