12 Point Head, Suit Aeroflow 320cc and Edelbrock Performer RPM Cylinder Heads, 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.

Kit Contains:

24 x Long Bolts.
100.1mm Under Head Length.
72mm Shank Length.
7/16-14" thread into Engine.
18.7mm Bolt Head Diameter.

8 x Short Bolts.
54.6mm Under Head Length.
27.5mm Shank Length.
7/16-14" thread into Engine.
18.7mm Bolt Head Diameter.

32 x Flat Washers.
20.5mm Outside Diameter. 11.3mm Inside Diameter.
3mm Thickness.