12 Point Head, Suit OEM and Aftermarket Cylinder Heads with 1/2" Holes, 8740 Grade Material.
Aeroflow Performance head bolts greatly improve your cylinder head-to-block sealing compatibilities. This is important in engines with high power adders such as turbochargers, superchargers or nitrous. They can even be a great addition to a mildly modified build as insurance against failure.
These head bolts are manufactured from aircraft quality 8740 high tensile strength chromoly steel and cold-forged to ensure molecular integrity within the bolt. Meaning these bolts are rated up to 190,000 psi making them stronger than Grade 8 and OEM fasteners. All kits come complete with hardened parallel washers for an even load distribution and accurate torque readings.
10 x Long Bolts. 101mm Under Head Length. 7.85mm Shank Length. 1/2-13" thread into Engine. 21.5mm Bolt Head Diameter.
10 x Short Bolts. 63.2mm Under Head Length. 33.3mm Shank Length. 1/2-13" thread into Engine. 21.5mm Bolt Head Diameter.