Ecoboost Performance Calibration M-9603-M4C Opinions

[stannypack]

this will perform worst than oem configuration and drop in filter. it looks super nice, but the closed oem airbox with drop in filter is proven to be the best.

Yep I heard that but imo it's a minimal difference, friend and I put some flashlights in the CAI and held the hood just shut and couldn't see any light coming out so the seal against the hood insulation is prob 95% as good as closed box

The sucking sounds are

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[FreePenguin]

thats true, unless you are sitting idling. I had an open box like yourself and closed box oem, oem would cool so much faster and stayed cooler longer. but you are correct, probably not much difference in real terms of things.