Cosworth High Performance Head Gaskets Bore = 101mm T = 0.78mm

Cosworth Subaru STI EJ25 metal head gasket is a high performance gasket designed to seal under high power under the most demanding conditions.

Cosworth's Subaru STI EJ25 head gasket is available in 101mm bore with a variety of thicknesses. 

Suitable for EJ257 engines with single AVCS

Each Cosworth Subaru STI EJ25 headgasket features: 

• Individual die cut layers of stainless steel with superior consistency compared to laser cut gaskets.
• Pre-coated stainless steel with a 0.25 micron layer of nitrile rubber ensures consistent distribution of coating with no high or low areas.
• Manufacturing dimensional tolerance of 0.002”.
• Die cut manufacturing process ensures smooth edges, unlike laser cut gaskets.
• Cosworth gaskets feature a “stopper” sealing layer for additional torque around each cylinder. The width of sealing area is specific for each application thereby providing ultimate sealing properties.
• Available in a range of thicknesses for specific applications.