IPD 3406E/C15 Cryo Head Bolt Kit

What makes cryo-treating so special? 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 residual 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-treated C15
head bolts are designed to ensure proper and even clamping
forces across your cylinder head and keep your engine running.

•16 of the 1241855 bolts
•10 of the 7N1961 bolts
•26 of the 5H1504 hardened washers