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Im not sure about the SVX's cat but the one on my old z if you just punched out the middle with out straight piping it, it would screw up ur exhaust airflow and actualy hurt your performance beacuse of it going from like 2 inch piping to 4 inch piping(the gutted cat) back to 2 inch piping
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1995 Red LSi
Mods: ECUTune Stage One, Smallcar shift kit, removed side SVX badges(weight reduction  )
Future plans: Alcyone emblem, black out taillights (Not that I think it looks overly good I just like people having no idea what it is and want to add to the confusion)
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