For friends that was resqueted for me. I take a pictures from the steelgasket that i bought. Is GM made for Pick-up 2.4 litre. The holes is 87.5mm of diameter, but don´t have problems in use with 86mm pistons. I can sell this gasket for about 65 US dollars more postage.
This gasket can work in more than 1.5bar of max boost without risk of blow.