how to tell?

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02-18-2006, 10:55 PM

TimmyGt

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how to tell?

how do I tell the diffrence between the non-pi heads and the pi heads how many diffrent type of pi heads do they make also what heaads would be in my car? (97 GT)

02-18-2006, 11:02 PM

JonBeast

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RE: how to tell?

Stock you have non-pi heads

02-18-2006, 11:06 PM

TimmyGt

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RE: how to tell?

is there only one none pi head?

02-19-2006, 12:28 AM

sprostang

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RE: how to tell?

Quote:

ORIGINAL: TimmyGt

how do I tell the diffrence between the non-pi heads and the pi heads how many diffrent type of pi heads do they make also what heaads would be in my car? (97 GT)

96-98`s come with non PI heads. 99-04`s come with PI heads

02-19-2006, 12:36 AM

TimmyGt

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RE: how to tell?

I know that I want to know how I can tell them apart or do they all look the same and you just have to hope the person selling them to you is telling the truth.

02-19-2006, 12:39 AM

BBond007

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RE: how to tell?

Count the bolts on the valve covers.

11 = NPI

more(13 i think) = PI

02-19-2006, 12:41 AM

TimmyGt

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RE: how to tell?

thanks, because I know my heads are not PI but I dont want to buy some that are the same as what I have. is there anything else to look for?

02-19-2006, 12:57 AM

BBond007

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RE: how to tell?

Well, I believe the ports on the head are shaped differently...

NPI resembles a tear drop, PI are more square.

02-19-2006, 01:01 AM

sprostang

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RE: how to tell?

Quote:

ORIGINAL: BBond007

Count the bolts on the valve covers.

11 = NPI

more(13 i think) = PI

Well, my 04 has PI heads and I only have 11 bolts on my valvecovers. [&:]

02-19-2006, 01:05 AM

#10

BBond007

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RE: how to tell?

Oops.

I guess i got my facts wrong....

Anyway

Here is a link

http://www.babcox.com/editorial/ar/eb40228.htm

If youy scroll down to the picture of the heads you'll see the ports on PI vs NPI

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