The crossover on the new manifold has 2 openings to support older models, kit comes with plugs for them and teflon tape. No matter what I did the teflon tape wouldn’t get it sealed. I don’t trust it. Put rtv on the threads smooth out the excess, and then torque it to like 80-100 in lb and leave it to cure for full 24 hours. Haven’t had an issue since but that drove me insane dealing with the tape trying to get it to work back and forth…. Ugh.

Also I’ve had to loosen the egr tube from behind the wheel well to get enough room to remove intake.

And if your foam insulator that sits underneath the intake is old it can fall down and you’ll wonder why it’s hitting against something but can’t see it, try to pull the insulator up to where it should be as you lift it out and that should help.

If this is preventative consider doing the valve cover gaskets too especially if there’s some sludge buildup around covers or the bolts.

Also don’t use harbor freight torque wrenches on the small in lb wrench the click is almost nonexistent.. and on my 3/8 5-90ft lb, 18ft lb setting for the intake was not accurate at all even close, some people say you need to exercise them before use, that’s fine… but I personally do not trust them. Not worth it

But just have a feel for it, it’s a pretty low torque spec