Product Catalogue

Performance Parts

Cylinder Head Stud Kits

Essential for high performance engine builds, heavy duty head studs reduce cylinder head movement in high boost or high compression engines optimising cylinder head to block sealing. Cosworth Ultra High Performance Head Studs are manufactured from 625+ tool steel with 240,000+psi tensile strength and come complete with nuts and washers. Manufactured with hex broach end for ease of installation.

Additionally, genuine Cosworth head studs utilize a base seating feature to evenly distribute maximum load on the stud and not the threads. This feature is typically found only in high level race engines.

Features:

  • 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
  • 240,000psi+ tensile strength
  • Special heat treat process includes heating in vacuum sealed furnace and quenched in a nitrogen chamber for precision control

Contact a Cosworth Dealer or Distributor to purchase this product.

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High Performance Head Stud Kits (180,000psi tensile strength)

Product Code Description
  Subaru
PR7243 Subaru WRX STI EJ25/EJ20 (2.5L) 11mm
  Nissan
PR7420 Nissan VQ35 (3.5L)
PR7767 Nissan SR20DET (2.0L)
  Mitsubishi
PR7843 Mitsubishi Evo 4G63 (2.0L)
  BMW
PR7422 BMW MINI Cooper/Cooper S (1.6L)

 

Ultra High Performance Head Stud Kits (240,000psi tensile strength)

Product Code Description
  Subaru
20043885 Subaru WRX STI EJ25/EJ20 (2.5L) 11mm
  Mitsubishi
20043886 Mitsubishi Evo 4G63 (2.0L) 11mm
20043887 Mitsubishi Evo X 4B11T Head Stud Kit
  Nissan
20002444 Nissan SR20DET (2.0L) 11mm