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Discussion Starter #1
i have a 2001 GTS automtic w/ a tanabe racing medallion exaust and an injen CAI. I'm gonna replace the cats w/ straight piping but what size? I was thinking prob 2.5" if possible. Also should I go w/ custom piping from the axle back(2.5" also?)? I want it t be a nice deep sound like a supra tt, not like civic. Any thoughts would be helpful. thanks
 

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2.5" I have one in mine's and it sounds fine. Seems to me that my downpipe increased my top-end power a bit. Try it and let us know..
 
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