If it was one mod that included the supporting mods i'd do twin turbos. But if it's one mod and slapped twins on It'd be pointless lol. So if just one mod, I'd say tune
Hmmm, the only mod installed right now is my axleback, which I do love(muffler deletes) but, I am sure there was no hp or tq gain from it. I guess the BFGs I have not yet installed will be the best mod when installed to date. They will perform much better than the 235s on there right now.