Are they any good? I have heard bad things about the springs and they would be replaced anyway. I am doing a rebuild and was looking at using them but not sure if it is worth the time and money. What is the max HP guys are getting out of them?
Thread: 500HP heads
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03-12-2009 05:22 PM
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03-12-2009 08:48 PM
500HP heads are just GM rectangular port heads.