No, the heads have not been cut or shaved.

If it is an intake leak, it must be rather small, as it runs great, there is no detonation or rough idle (besides from the cam).

2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.

Searching for new A or B Body Project!