Hi stifler, welcome to the forum. As regarding mods, if you go for the ST200 injectors, you will need a ST200 ECU, as the standard V6 map will just lead to overfuelling. ST200 UIM is a good mod (and one I'm hoping to do once funds allow), but you may already have the ST200 LIM, as some Cats were fitted with them (and later ST24's as well), to find out which you have check your fuel rail, if it's round topped, then you have the ST200 LIM, if it's flat topped then you don't. As you've already mentioned, you can remove the 3rd Cat, as you still have the pre-cats, or you could fit stainless steel exhaust manifols, which also come with a freer flowing Y pipe, and fit a sports cat. Be warned though, changing the manifolds is a PITA, and far easier with the engine out. Once all the performance mods are fitted, then it's time to get it remapped to tie all the mods together. I would personally go for a remap whilst it's on a rolling road, because live mapping is customised for your engine, rather than a generic map for a V6, having said that Bluefin can be customised to your engine mods, if you let Superchips know what you've fitted. Hope this is of some help.