I need some opinions. I just finished my custom aluminum intake manifold. It has a 4 in. Alum. Inlet on it. Does everyone think I should keep with the trend and make all the tubing from the turbo to the manifold 4 inch even though both of my intercoolers go down to 3-3.5 inch or am I wasting material and should stay with 3-3.5 until the intake??