I was looking thru Ebay and found some pics of the 5.3L Gen III truck heads vs the LS1 heads, so I thought that this would be a good place to talk about them.

I know that the GEN III heads allow you to run much later timing in the 28 deg range, and I have heard that the 5.3L chamber is one of the better new designs.

What do you guys think?

LS1 Chamber

5.3L Chamber

Bret

 

To me, they both look like the same chamber, just milled down & with larger valves for the LS1