Aeroflow GM LS Head Bolt Kit with Even Length (AF37-2125)

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.

Kit Contains:

20 x Long Bolts.
103.2mm Under Head Length.
10.9mm Shank Length.
M11 x 2.00mm thread into Engine.
18.7mm Bolt Head Diameter.

10 x Short Bolts.
48.4mm UnderHead Length.
7.7mm Shank Length.
M8 x 1.25mm thread into Engine.
14.6mm Bolt Head Diameter.

20 x Large Flat Washers.
21.8mm Outside Diameter.
11mm Inside Diameter.
3mm Thickness

20 x Small Flat Washers.
15.8mm Outside Diameter.
8.25mm Inside Diameter.
3mm Thickness.