Best Mod: SU TMIC. Was a pain to install (bolt holes didnt line up) but the results are better than I'd hoped. Car pulls strong all the way to redline; no tapering off in power like there used to be in the higher RPMs.
Worst Mod: CPE Turbo Inlet Pipe. A REAL PITA to install for negligible benefit. I want my $250 bucks back!