What others have said--no need for UP, and no need for fuel mods at this point. Regarding the EBCS, you should really ask your tuner rather than folks here. That will be the most important factor in weather or not you should install that bit. For your intercooler, see my signature.
Make sure you have all new gaskets as well. If you nix the UP, you'll only need a DP-to-turbo gasket and possibly a new donut gasket for the DP-to-midpipe connection. Do you have an adapter if required for that connection? I believe the invidia DP is 3" and the stock midpipe will be 2.5".