Stage 8 Locking Header Bolt Kit - 3/8"-16 x 1" External Hex Head - Stainless Steel - Natural - SB Chevy, V6 - Set of 12

Stage 8 locking header bolts use a patented system that consists of a Grade 8 quality grooved hex-head bolt, a retainer, and a snap clip. a retainer fits over the bolt head and locks the bolt against the header tube, and the snap clip holds the retainer in place. Once Stage 8 header bolts are tightened down, they won't back out, eliminating leakage and blown header gaskets from loose bolts. Made in the U. S. A.