Thinking about purchasing some Ls3 heads from procomp. Do anyone have any reliable feedback on Procomp Ls3 cylinder heads? Are they worth getting or will i be wasting money on them? Any info would be appreciated.

 

There is nothing wrong with those heads. Just buy them bare and put in some good valves and springs. The CNC job on them is pretty good as well. I believe I have the flow numbers.

Lift Intake Exhaust
.100 72.0 59.3
.200 156.9 127.9
.300 232.1 177.1
.400 286.2 221.0
.500 324.8 248.0
.600 350.9 256.0
.700 365.6 265.1

 

Check this out this guy said he had a problem with stock rockers and the stands due the raised intake runners. He is a member here on tech http://www.ls1gto.com/forums/showthread.php?t=456475

 

Haha someone needs to tell that guy he put his rocker rails on upside down!