Did you know that your factory head bolts are only made for a single use? Many people have learned this the hard way. When reusing your factory head bolts they are prone to cracking, sometimes in half, when you apply torque to them. These S&S head bolts alleviate that problem. They are made with heat-treated 8640 steel, have a 200,000 psi tensile strength, and are coated with a durable black oxide coating. What doe all of that mean? They are far stronger than your factory bolts. In fact they are reusable! The piece of mind that you gain with these head bolts far outweighs the price. Includes all 8 headbolts.