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Old 08-24-2009, 06:46 PM   #1
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how can i tell if i have PI heads or not?

I bought a 98 gt from a dealership back in july and it had some basic aftermarket stuff added to it performance wise but i dont know just how deep the previous owner got into it. I know the intake has been swapped out but again dont know if its the pi version... what numbers should i look for and where can i find them? i just wanna know everything i possibly can about this car as any other car fella would. lemme know what ya know!:burnout:
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Old 08-24-2009, 10:05 PM   #2
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Re: how can i tell if i have PI heads or not?

basically the easiest i can definitely assure you which heads you have is to take the inatke off and look at the intake ports on the heads. i know there are casting numbers but they are rignt by the exhaust manifold which is pretty hard to see while in the car.
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Old 08-25-2009, 08:12 AM   #3
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Re: how can i tell if i have PI heads or not?

You may can find comparisons so you can see the casting stamp on the side of the head to see what years they came from but i personally do not know. It should be pretty noticeable power wise as stock heads are 215 hp stock and PI heads are 285 on pre 99 4.6ls.
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Old 08-26-2009, 08:10 PM   #4
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Re: how can i tell if i have PI heads or not?

well the only other mustang i have driven was my old 88 5.0 so i wouldnt know the difference if it slapped me in the face but when i get bored enough i will certainly pop off the intake. thanks guys! oh and to modular2valve... where did you get your saleen body kit? my side skirts are broke and need to find some replacements
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Old 08-26-2009, 09:56 PM   #5
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Re: how can i tell if i have PI heads or not?

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