PI Heads

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Old 01-12-2006, 05:28 PM
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PI Heads

What year did they start putting PI Heads in trucks I picked up a 99 f150 singlecab 4x4 and do not know if it has the PI Heads?
 
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Old 01-12-2006, 06:47 PM
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99 was the first PI heads I believe.
 
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Old 01-12-2006, 07:22 PM
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pi heads have square shape intake ports, and non-pi heads have oval shape intake ports. that is the easiest way to tell the two apart.
 
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Old 01-12-2006, 07:30 PM
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Or you could just look at the casting numbers through the wheel well.

There's some pictures in this thread:
https://www.f150online.com/forums/sh...hlight=casting
 
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Old 01-12-2006, 10:03 PM
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Originally Posted by jpdadeo
pi heads have square shape intake ports, and non-pi heads have oval shape intake ports. that is the easiest way to tell the two apart.

define square intake ports? on the PI heads... cause i dont see the difference.. or what makes them square. its more of a flat oval..
 
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Old 01-12-2006, 11:13 PM
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Old 01-13-2006, 10:28 AM
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4.6 didnt get pi heads till 2001 and 5.4 got them in 99
 
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Old 01-14-2006, 02:28 AM
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damn from that description my ported heads i bought are actually PI heads... grr just from the difference i just now noticed. hope this intake will match up
 
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Old 01-14-2006, 02:52 PM
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yeh i just checked the casting numbers 2001 mustang GT heads. they are brand new heads were never used. and ported so its all good just means i get to buy the better flowing intake!!
 



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