DD15CHBKFR | Cylinder Head Bolt Kit Cryogenically Treated

Cryogenic heat treatment is a precisely engineered process of taking materials down to approximately -310°F, keeping them at that temperature in liquid nitrogen to remove residential stresses, and then ramping temperature back to room temperature, followed by a mild heat treatment process.

The end result is a considerably longer life bolt with less internal stress and optimized tensile strength. IPD's cryo-trated head bolts are designed to ensure proper and even clamping across your cylinder head and keep your engine running. Each bolt is packaged in its own netting to prevent abrasions. Each cryo-treated head bolt has a blue dot on its head so that you know it's been cryo-treated.