Intake woes

[Houston Ben]

Hi all,
I finally got around to installing my sanden compressor on pass side with DD mount. Problem is, now I have to buy a new intake and was looking at either a u-build-it airaid or Spectre flex tube. Using the flex tube I will have to find a way to make my delphi MAF work.

The space between the ac and the e-fan is barely over 4" and a 4" tube will fit but do I need a 4" tube? Will a 3" work fine? The engine is a stock 5.3 with tune and I am using a modified stock intake for now, does anyone know the diameter of that?







Any thoughts would be appreciated.

Ben