I put the Spectre set up on my D150 5.2 Magnum , I put one hole in the radiator support on the left of the radiator so air is coming from behind the grille and put a screen to keep junk out and hooked the right side hose to a factory inlet that comes out under the turn signal. I found a factory looking 318 air cleaner sticker and put it on the Spectre chrome air cleaner it looks good, I dont have any numbers but it seemed to have helped get fresh air in.
