This Cometic MLS cylinder head gasket fits 2018–2021 Subaru WRX STI EJ257 engines with a 101.3mm bore and .036in thickness. Constructed from multiple embossed layers of AMP coating and uncoated stainless steel, the gasket uses an uncoated shim center layer to accommodate thickness needs, reduce clamp load and help distribute sealing load across the sealing area as described.
Cometic 18-21 Subaru WRX STI 101.3mm Bore .036in MLS Cylinder Head Gasket