The MaxRev kits don't come with any fuel management, and you have to weld your own (provided)piping. I don't really like their manifolds, but they're better than the DRAG ones. The MAxRev DP's are really nice, though. 2.5" with flex. You can also choose the specs of your turbo, but the MaxRevs come with T3/T04E's(unless you upgrade to a T3/60-1), and even with a small trim it might not spool as fast as some people would like. It's a good base to start with if you know what fuel components you want to run. If you go MaxRev, I would get the package that comes with the Hondata S200, and then all you would need is some big injectors and get it tuned. Plus you get the nifty 3-step. Oh, you would need an OBD-I ECU and an adapter harness too, since you're OBD-II.