i heard if you add two extra injectors with your turbo kit perfomance would increase...how it that...and would 550's do??...i dont wanna run to rich which is what im thinking what will happen if i add extra injectors...thanks..any help would be appreciated

Yes it does help but you need a fuel management system that can run the normals + the extras.

but yeah it helps control detonation by making sure your not running lean.