I'm thinking w126, and m104 motors are malhe pistons.My son is a engineer there, at tennessee plant. They do offer custom sizes.some people use a compound head gasket to lower compression,plus they are better than stock ones.
Since most things will be electric soon,son willl move to Denso,in my area also.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt