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Topic: ? about gt40 aluminum heads
From: South Point, Ohio, USA
Registered: Feb 2002
posted 04-04-2003 10:16 PM
I looked my heads over today and was looking at the numbers on them and when I bought them they were supposed to be the "Y" heads which are 40 bolt on hp. But the number on the casting is "x-302". can anyone help me out with what I have? Thanks, steven leighty
From: Lyons, IL, USA
Registered: May 99
posted 04-05-2003 04:54 PM
They are the later design that flows a little more.
X heads have 178cc intake runners and 62cc exhaust as opposed tot he Y's 160 and 53cc runners.
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