When installing headers you will need header bolts, factory exhaust manifold bolts won't work. These Aeroflow header bolts are made from Grade 8 steel for strength. They are coated in a black oxide for protection and long-lasting durability. Each hex head is designed to take a 7/16" spanner size. This compact hex head is ideal for use where space is minimal on most aftermarket header flanges.

Product Reviews for AF37-1000 - AEROFLOW