Chev SBC 283 307 327 350 383 400 ARP Intake Manifold Bolt Kit # 134-2101Chev SBC 283 307 327 350 383 400 ARP Intake Manifold Bolt Kit # 134 2101 Bolts, Intake Manifold, Chromemoly, Black Oxide, 12 Point Head, Chevy, Small Block Kit ARP's rugged, black oxide coated chromemoly intake manifold bolts are rated at 170,000 psi. They're precision machined for optimum thread engagement, and have a wide area flange for better load distribution. They also feature precision rolled threads, which prevent galling while promoting more