The Cometic multi-layer steel (MLS) head gasket for Subaru EJ22/EJ25 hybrid motors is specified at 100mm bore and .051 inch thickness and uses multiple embossed layers of AMP coating and uncoated stainless steel. The construction delivers an embossed outer layer with a center uncoated stainless shim layer. Cometic's MLS design is described to conform load distribution across the sealing area, require less clamp load to reduce bore distortion, and meet demanding sealing environments as noted in the features.
Cometic Subaru EJ22/25 Hybrid Motor DOHC 16V 100mm bore .051 inch thick MLS Head Gasket