TA Performance offers hi quality stainless steel hardware for many popular applications. We use only 170,000 psi (better than grade 8) material,  polished to a chrome like luster. These bolts are capable of withstanding the proper amount of torque for the intended application. Please be aware that standard and less expensive stainless hardware will twist or break when fully torqued. The bolt head design is the small hex for that performance look and easier accessibility. Ideal for use on timing covers and water pumps as well as exhaust manifolds where original type hardware is prone to corrosion. Also, a great upgrade for the intake manifold for that sanitary and custom look.