I don't think the Egge's make the same compression as the stock pistons. I did a side by side comparison of the Egge piston against an old TRW forged commando piston which is no longer made. The Egge had lower compression height and bigger valve reliefs. I think the TRW's were closer to the factory commando pistons.
I know toolmanmike had trouble getting compression with these pistons.
