Sorry this has been answered before guys...
I am about to buy a gt40 intake manifold, probably an explorer.
Most of the ones I see on ebay say up to '93 because of the boss for ACT and internal EGR.
What would I do with both of these things? Plug the ACT hole and EGR passages?
Thanks
Joe
You would need to plug the ACT hole in the #5 runner in the lower intake if there is one. The EGR hole in the lower doesn't need to be plugged because the upper intake will cover it if there is one.
The reason I am saying "if there is one" is because the Explorer's used an external EGR setup similar to our 94-95 mustangs. I doubt those holes are drilled and tapped on Explorer intakes. Mine aren't and that is because I have the later model intake with the airgap in the upper intake between the two sets of staggered port holes.
I am pretty sure the earlier model Explorer intakes weren't tapped and drilled to save time and money on the assembly line.
That bottom picture shows clearly that there is no hole for the ACT. Look at the #5 runner...see that circle just to the right of it. That is where the ACT would go on a Fox style lower intake.
I have a red X for the second picture.
The first picture shows the EGR hole just below the TB opening. If you use an elbow adaptor it will block off that hole which is what you want it to do.
On the 94-95 the EGR gasses go right into the TB opening through the side of the elbow adaptor.
The hole right below the #5 is for the fuel injector. Notice in the picture that the #6 has the same hole. All the intake ports will have an injector hole. The hole on the bottom or your picture is for your coolant temp gauge (instrument panel gauge) sending unit. If you look on your stock lower intake you will see what I mean.
Also, the upper intake has way more vacuum ports than you need on the Mustang. You can either block them off or loop hoses from one port to another.