Do i need? (quick question)
#1
Do i need? (quick question)
I will be installing an MS4 cam, a used FAST 90 intake, underdrive pulley, and a Yank SS4000 in my car with the other mods that are already installed in my sig. I am wondering if i need to up grade the injectors or is it not necessary. After these mods i wont be doing anything else to the engine of the car.