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Home » Subaru WRX/STI » Engines & Components » Head Studs   Cosworth - Subaru EJ20/EJ25 High Performance Cylinder Head Stud Kit Essential for high performance engine builds, heavy duty head studs reduce cylinder head movement in high boost engines optimizing cylinder head to block sealing. Ultra high performance fasteners are manufactured from high tensile strength steel and come complete with nuts and washers.     Price: $299.00   « Previous | Next »