Alright i have a set of ls1 heads off my 99 camaro. They were cnc ported but i dont know by who. They were on the car when i bought it. So i dont have any flow numbers. sorry.
anyway i just had a new valve job done on them, $252 so they are ready to bolt on and go. They are 59cc. And 853 casting. I also have a custom grind cam from comp. 224 224 566 566 on a 114+4

i dont have any dyno numbers either but for such a mild cam it pulled pretty hard. it revs really fast. Way faster than my 500rwhp 408 did.

$750

ls1, 6.0 , 6.2 camaro trans am firebird formula corvette