so i was hearing about the existence of a specialized asa head that used to be available. from the best of my reading it seems that the head is just a stock ls1 head with ls6 valve springs.


does anyone else know anything about these heads? is what i am reading correct?

 

GM part # 25534321 Is the CNC LS1 head with z06 springs.

GM Part# 88958622 is the CNC LS6 Head.