Then, no you don't need bigger injectors. The only time you really need larger injectors is if your playing with your cams, compression, timing, etc. For the most part though, unless you change your internals you wont need injectors.

It's just another, hey look what I got, if you don't need it, and for the most part, it may be a new toy that's a pain in the ass to get working correctly. As frequently different size injectors, especially if the fuel isn't used, can cause idle problems such as a oscilating idle, and really bad cold starts.

Later,
Aj