need diffenet size boost jets. Cause they come in different sizes, cause not all cars are alike and they take to the jets differently. Your car should be sitting around 12 to 13 psi after done. But some here on the forum get around 15 psi from this mod, which is still safe. But taking life out of stock injectors in the long run. But it is one mod I think every Ztt owner should do. It make the car run like it should of from the start. It does a lot more than raise psi.......... :)
