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Discussion Starter #1
Somebody explain this one to me. I haven't ever heard anybody talk about this until today. I found a pair of 5.4 heads on Ebay for a 4.6 and I wondered if this is right. If it is, what kind of performance improvement would those heads make?
 

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They are the same head that you have. They are just PI heads.
I read an ad on ebay claiming that PI heads from a 5.4 on a 4.6 was called the GT 40 heads. That is a load of Bull****.

No gain here folks keep moving.

Dwayne
 

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46GTSblown said:
They are the same head that you have. They are just PI heads.
Exactly. And Dwayne...not trying to be a school teacher, but it's loser (not the winner), not looser (not as tight).
 

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Discussion Starter #5
Dwayne, you probably saw the same ad on ebay that I was looking at. The guy wrote 'gt40' and I thought that wasn't right but I have learned never to underestimate my own stupidity so I figured I would ask some people who knew.
Mike
 

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its the same head.
 

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46GTSblown said:
I read an ad on ebay claiming that PI heads from a 5.4 on a 4.6 was called the GT 40 heads. That is a load of Bull****.
The sad part is that someone alreay bid on them...and they aren't even PI heads.
 
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