View Full Version : 500HP heads

03-12-2009, 05:22 PM
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?

03-12-2009, 08:48 PM
500HP heads are just GM rectangular port heads.