Hi, I Have A 93 R33 Gts Is It Possible To Add A Turbo Or Supercharge In This Modle With Out Having To Replace The Entire Engine. (and The Rest)

yes it is. You will need to change the pistons though to GTR pistons which drop the compression down a bit. It isn't totally necessary but very advisable. Also a new ecu, loom, injectors, cams, exhaust manifold, and the rest of the supporting gear. Not to mention the fuel pump.