The Cometic MLX head gasket for Hemi Gen3 Iron Eagle blocks with a 4.150 in bore (RHS) incorporates an integrated "stopper" layer to seal the combustion chamber. MLX construction improves clamp load around the cylinder without increasing bore distortion, making this gasket suitable where the 4.150 in bore and RHS orientation are specified.
Cometic Hemi Gen3 Iron Eagle Block .054in MLX Cylinder 4.150in Bore RHS Head Gasket