Sorry to high jack this thread but what is a catted up pipe, from the work its self sounds like there is a cat in the up pipe?, but wouldnt this re strict the flow a little bit ?

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Marti


Car: C Red S13 Silvia 2.3l 400+rwhp-SOLD
Daily ae82 4age corolla (light mods)-Sold
Daily:SWB GQ Patrol
Will be a 03-04 STI next