Big Block Chev 396-454Head Bolt Kit12Point Head, Suit Aeroflow 320cc and Edelbrock Performer RPM Cylinder Heads, 8740 GradeMaterialBrand: AEROFLOWPart Number: AF37-2111Description: Aeroflow Performance head bolts greatly improve your cylinder head-to-block sealingcompatibilities. This is important in engines with highpower adders such as turbochargers, superchargers or nitrous. They can even be agreat addition to a mildly modified build as insurance against failure.
These head bolts are manufactured from aircraft quality 8740 high tensile strength chromolysteel and cold-forged to ensure molecular integrity within the bolt. Meaning thesebolts are rated up to 190,000 psi making them stronger than Grade 8 and OEM fasteners. Allkits come complete with hardened parallel washers for an even load distribution and accurate torque readings.
Additional Specifications: 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 ShortBolts.
54.6mm Under Head Length.
27.5mm Shank Length.
7/16-14" thread into Engine.
18.7mm Bolt Head Diameter.
32 x FlatWashers.
20.5mm Outside Diameter. 11.3mm Inside Diameter.
3mm Thickness.