It won't be a fair comparison. I added the non-cat down pipes, 160 Stat, SP534s, (lighter wheels(?) and lighter driver) and 3 Bar all since the last time I was out. But I do feel the 3 Bar is worth it. You can find them around $100 +- , pop it in like nothing and tune for it.
Btw, with all these changes, I am dying to see how deep I can get into the 12's. There's not really anymore performance mods left for me. This year!