This HKS grommet-type head gasket is specified for Subaru FA24 engines with a 1.2mm thickness and an 11.3:1 compression ratio. The product listing provides the gasket type, thickness, and target compression ratio so it can be selected appropriately for FA24 engine builds requiring the stated sealing profile and spacer dimension.
HKS Subaru FA24 1.2mm Thickness 11.3 CR Grommet Type Head Gasket