3 times a charm, if you do low comp pistons then you wouldnt want the thicker low comp head gasket, that makes me think, if someone bought the ip 3mm hg and also had low comp pistons, would their compression ratio go down to like 7 to 1? or it doesnt work like that?

 

Pass, sure it works like that.

 

The 2.0L has been out since late 99 and is still produced. The 2.2L has been out since late 2003.

I'm not sure it there is really much of a difference between boosting them. I have a boosted 2.0L. Changes I made were 02-^ oil bolts and AP2 retainers but these are nice mods even for NA.