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Home » Subaru WRX/STI » Engines & Components » Head Gaskets   Cosworth High Performance Head Gasket Cosworth High Performance Head Gaskets are engineered to seal in power under the most demanding conditions. Constructed from stainless steel with a folded stopper layer, each application features superior sealing compared to conventional multi layer steel gaskets. Additionally, Cosworth High Performance Head Gaskets are manufactured from pre-coated die cut stainless steel resulting in uniform coating distribution and consistent shape. Subaru gaskets are sold individually. Order two for a complete set.   Options Please Select...Subaru WRX STI EJ25 (2.5L) Bore = 101mm T ~ .78mm each Subaru WRX STI EJ25 (2.5L) Bore = 101mm T ~ 1.1mm each Subaru WRX EJ20 (2.0L) Bore = 93mm T ~ .78mm each Subaru WRX EJ20 (2.0L) Bore = 93mm T ~ 1.1mm each   Price: $89.00