2006 gto low compression

[ak gto]

i have a 2006 gto with a p1sc procharger pushing 7 psi of boost, and a cat back exhaust. my problem is that i have low compression on all 4 cylinders on the drivers side. all 4 cylinders have different compression as well. The passenger side cylinders all have good compression. I did a leak down teat and could hear the air going in the oil pan through the valve covers. i also replaced the head gaskets, and that made no difference at all. Is it possible that i broke the ring lands only on the drivers side? what else could be the problem?