I'm looking into changing my injectors but don't know sh*t about them. My car only has 42,000 original miles and is all stock. I was reading kirbans book and they say to stay close to stock (which I want to do) go with the Green Stripe performance injectors set. The green stripe has disc ends not pintle ( sounds good). Anyone know about these or others and how hard is it to change these. Step by step would be great. remember I want to stay as close to stock as can. Thanks