APEXi Engine Metal Head Gasket Subaru EJ20, 93.5mm - 814-F00X

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The A'PEXi metal headgaskets provide upgraded protection on high horsepower engines. Factory headgaskets cannot withstand the pressures of high output operation and often cause the engine to "blow." This condition is actually caused by a failure in the factory headgasket. A'PEXi recommends replacing the factory headgasket with a metal one before gasket failure causes more damage to the engine. The gaskets are all designed engine specific and provide a complete and secure seal.

Bolt-On Yes
Part Number

814-F001 : T=0.8

814-F002 : T=1.5

814-F003 : T=2.1



Engine EJ207, EJ20G, EJ20K
Gasket Type Grommet Type
Gasket Bore 93.5mm
Engine Bore Size (mm) 92mm (factory)
Gasket Thickness (mm) T=0.8mm
Compression (Factory Head Gasket) EJ20G=9.0, EJ20K/7=8.0
Compression (A'PEXi Head Gasket)

814-F001 : EJ20G= 9.7, EJ20K= 8.5, EJ207= 7.9

814-F002 : EJ20G= 9.0, EJ20K= 8.0, EJ207= 7.4

814-F003 : EJ20G= 7.9, EJ20K= 7.4, EJ207= 7.1

Special Notes Sold as a set of 2 gaskets
WARNING: California Prop 65
Cancer & Reproductive Harm