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[SmokeyWren]

I don't have the numbers for my current AIS, but it is very similar to the old TurboRamAir intake I had before.

The main reason for replacing the stock intake with one that will allow more air into the turbo is to allow you to pull more weight, or climb a steeper grade, or go faster up a grade, or any combination of those three, without too-high EGT.

If you have a towing tune and set your cruise on 62 MPH, then downshift to 3rd (kill OD), then climb a 6% or steeper grade while dragging a trailer that grosses 8,000 pounds or more, then you're going to exceed the 1,250° pre-turbo EGT redline with the stock intake. Even with an excellent intake, you still have to drive by the gauges to be sure you don't exceed the EGT red line, but you'll be able to go about 5 MPH faster with the good intake.

Here's partial results from the tests I ran when I installed my TurboRamAir intake:

Stock truck, except for Walker BTM muffler, LT295/75R16 tires, and about a 60-horse towing chip, dragging a fifth-wheel low-profile RV trailer that grossed about 6,000 pounds.

Stock intake with new Motorcraft paper filter:
(pedal to the metal)
Zero to 60 MPH = 15 seconds, max EGT = 1,175°, max boost = 25 PSI
(simulated passing on a two-lane highway)
50-to-80 MPH = 17 seconds, max EGT = 1,175°, max boost = 25.

Same setup but with TurboRamAir intake:
0-60 = 15 seconds, max EGT = 900°, max boost = 26 PSI
50-80 = 17 seconds, max EGT 950°, max boost = 27 PSI

So no more horses, but significantly lower EGT.

Lowering your max EGT is a misnomer, because you don't need to lower your EGT as long as you're below the 1,250° red line. But those numbers show that the better intake definitely lowered the EGT at the same load/speed/grade.

When crossing mountains, I'm glad I have the AIS now, just as I'm glad I had the TurboRamAir for several years before the plastic airbox disintegrated. On most interstate mountain passes, including I-70 and I-90 across the Rockies, grossing 16,000 pounds in third gear I can maintain 55 to 60 MPH without exceeding 1,250° pre-turbo EGT.