B58 Crank Bolts
 
With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.
Zinc-plated steel screws resist corrosion in wet environments. 
 
The OE B58 Crank pulley fasteners may be fine for OE properties, and does not work well.  The Crank pulley is a 4-piece design friction welded together and specifically uses the 4 bolts to hold it all together.  We are seeing the pulleys come apart and is dangerous. Our fasteners are a must for big power B58 cars.
 
Specifically designed to support the load and tensile requirements of increased output.
Required to reach ASTM conformance certification.  All Material must conform to AMS batch raw materials.
Thread engagement and shank is optimized for each given bolt in its specific location. 
Meet or exceed a minimum allowable tensile strength of 170kpsi.  
 
This kit contains 4 bolts, use red loctite and torque to 55ft/lb