Engine Intake Manifold Hardware - For appearance

As requested from my progress thread. Here's the hardware I used for my Cobra intake install.

I must make note here however that this is for a Cobra intake WITH a 3/8" intake manifold spacer. If you do not have a spacer, or have a thicker spacer, you will need to adjust accordingly. This is also stainless steel

I ordered the hardware from McMaster-Carr https://www.mcmaster.com/

Center Studs - P/N 92997A356 x 2
Outer Studs- P/N 92997A353 x 2
Short 12-point bolts - P/N 96242A641 x 2 (These are ARP stainless bolts)
12-point nuts - P/N 90997A800 x 4 (These are ARP nuts)
SS Washers - P/N 91877A131 1 pack of 25 (optional)

Here are your studs and nuts. For my setup, I trimmed 1/2" off the studs on the long threaded side. Was easy to do. Run a nut up the stud, clamp in vice, and use a hack saw to trim the 1/2" off. Use a file to clean up, and then run the nut down to clean up the threads.



And here it is installed



If you wanted consistency, you can swap the two small bolts out for studs. I'd get two more nuts and a 2" to 2 1/4” long stud (P/N 92997A335 )

Edit: 2” stud would work without a spacer. With a 3/8” spacer it’s a tad short. It works, but 2 1/4” would be better.

If you didn't want Stainless steel, you could go with black-oxide steel. here are your part numbers. Disclaimer...I haven't personally tried this setup.

Again, Cobra intake with a 3/8" spacer. You'll need to adjust based on your needs. You also may need to trim the studs slightly.

Center Studs - P/N 90281A107 x 2
Outer Studs- P/N 90281A120 x 2
Short 12-point bolts - P/N 91271A589 pack of 25 (these are NOT ARP)
12-point nuts - P/N 90759A200 x 4 (or 6) (These are ARP nuts)


And if you choose to use all studs instead of bolts, use P/N 91025A591 and grab 2 more nuts.

If anyone tries this for different intake manifold or spacer setups, please post up your results.

7991LXnSHO said:

Is this likely the same for an early Exploder intake?

Click to expand...

I think the 4 studs are the same on the explorer. I have an upper next to me actually, and it looks like without a spacer, that 4 of the 7" studs would do it. Might need to trim off maybe 1/4" or so. Short ones look to be the same


EDIT: Of course, the two under the cover won't be seen, so i think you have to use regular bolts here to stay low-profile.

That’s a bummer. I did end up buying the 2” stud for the short ends as well so everything matches. I bet they will be too short with a 3/8” spacer but I’ll test fit tomorrow.

trimming the long studs is pretty easy to do.