alright guys, i need brakes. i wanna do the 12 inch upgrade. i should be able to get 12 inch rotors and use my stock calipers right? and what about the brake pads? do i use the same brake pads? does anyone know how i can get 12 inch rotors besides off of zzp?

now fuel injector. i notice ppl put injectors that push more pounds. is that a big hp boost and does it hurt gas mileage? my fuel injector in cylinder 2 is so bad that its making my car run like crap really bad and i'm not sure what i wanna do. i dont wanna spend a lot of money. my car is stock besides a cold air. i'm sure running only one injector that pushes more pounds is bad right? `a stock injector is like 75 bucks and i'm broke and slightly cheap. if anyone could answer those questions that would be great. thanks guys