Identifying PI heads

Red66GT said:
Are there any visual differences between PI heads from 99+ mustangs and regular 4.6 liter heads from a 97 mustang? Just wondering if there are ways to tell by looking under the hood.

The only way I know of is to look at the intake openings. PI heads have a rectangular opening and the older heads had a teardrop/oval opening. I don't know of another way.
 
intake?

Kilgore Trout said:
Heads mang, HEADS...

my pi intake is all plastic.

only way to tell is heads, but... I doubt anyone put an NPI intake on PI heads.
the front intake runner on NPI goes to the passenger side of the block. good luck. I had the same questions...but i just figured the lame no power 96 heads were on it because it was well... lame.
 
I have the bullitt intake and was told that an 01 bullitt engine was put in my 97, I figured the only way to be sure that the bullitt intake wasn't slapped onto the 97 engine was if I could confirm that the PI heads were on there (even though that wouldn't necessarily guarantee the car has had the bullitt engine swapped, it would be much more likely).
 
The only way I know of is to look at the intake openings. PI heads have a rectangular opening and the older heads had a teardrop/oval opening. I don't know of another way.
 

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