There is a lot of guess work going on here!
The car in question had the cats removed by Pro-Speed, and I can confirm (Ive got the pics as evidence) that there are THREE seperate cats. Both sides of the manifold have one each, and then they join together into a third cat. All these were knocked out, and going by the amount of work it took to get to them, replacement would be VERY expensive.
But, loopee, no disrespect, but I think youre mistaken about what is causing the problem. Have you had the coil packs checked out? They go all the time on V6 mk1s and are the most likely cause of the performance drop.
As Ive said before, when I owned that car, I never had any performance related issues from the decat. If anything, it was more free-revving and pulled harder at high rpm.
Feel free to drop me more PMs if you want to chat about it.