Stage 8 Locking Header Bolt Kit - 3/8"-16 x 1" External 12-Point - Steel - Nickel Plated - SB Chevy - Set of 12 Fresh Air System Inlet Chevy Monte Carlo SS 1983-88

Chevy Monte Carlo SS 1983-88

4 AN Hose to 1/4 in NPT Male O-Ring

7 in Oval Port

Every car or truck has unique mechanical and acoustical properties

Very strong mid-range torque and throttle response

Stage 8 Locking Header Bolt Kit - 3/8"-16 x 1" External 12-Point - Steel - Nickel Plated - SB Chevy - Set of 12 Fresh Air System Inlet Chevy Monte Carlo SS 1983-88Stage 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. Stage 8 Locking Fasteners has provided