Aeroflow GM LSA Head Bolt Kit (AF37-2129)
12 Point Head, 8740 Grade MaterialGM LSA HEAD BOLT KIT
12 Point Head, 8740 Grade Material
Part Number: AF37-2129
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 chrome moly 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 washers for an even load distribution and accurate torque readings.
Specifications: Kit Contains:
20 x Long Bolts
103mm Under Head Length
6.80mm Shank Length
M11 x 2.00mm thread into Engine
18.8mm Bolt Head Diameter
13mm Spanner Size
10 x Short Bolts
48mm Under Head Length
7.50mm Shank Length
M8 x 1.25mm thread into Engine
14.8mm Bolt Head Diameter
10mm Spanner Size
20 x Large Flat Washers
24.15mm Outside Diameter
11.30mm Inside Diameter
3mm Thickness
10 x Small Flat Washers
16.70mm Outside Diameter
8.45mm Inside Diameter
3mm Thickness
75 ft.lbs (101Nm) Torque Setting
Important Information: Torque Recommendations
75 ft.lbs or 101Nm