i have tried searchmy cat is going i have 90000 on my corrado vr6 so heres my? why not just hollow out the cat? i know i can build a teat pipe for little money but is there a up side to a test pipe rather then a hollow cat. btw heres my mods if that matters. garret chip, (soon to be a TT chip) recent full rebuild 2.9 motor,(2000 miles) TT 264/260 cams, removed suitcase, mild head work, i also plan on a turn2 cold air intake as soon as my money tree in back starts to bud agian.