I'll bite before @
SarcasticOne does :P
Have a look at BNR supercars' S1 replacement. Its basically a higher flowing k04 turbo that's a little more robust. You get all of the same characteristics with none of the crap seals (Sorry on my phone so can't link).
To be honest from the parts you've listed, once you've fixed your turbo you should look into a HPFP and an AcessPort v3 and a etune. You've got the makings of a pretty tody package there
but you're about half way from unlocking some pretty decent and reliable power there.
Edit: also not many fans of MRT around here just quietly :/