Cosworth 20002440 Ultra-High Performance Cylinder Head Stud Kit Subaru WRX STI EJ25/EJ20 2.5L
Essential for high performance engine builds, heavy duty head studs reduce cylinder head movement in high boost or high compression engines optimizing cylinder head to block sealing. Cosworth Ultra High Performance Head Studs are manufactured from H11 tool steel with 260,000psi tensile strength and come complete with nuts and washers. Manufactured with hex broach end for ease of installation.
- Essential for high power applications
- Superior strength compared to other brands
- High clamping force helps to seal block to cylinder head joint
- Hex broach ends ease installation
- Roll Die formed threads
- 260ksi+ (260,000psi+) tensile strength
- Special heat treat process includes heating in vacuum sealed furnace and quenched in a nitrogen chamber for precision control.