ARP BOLT KIT SB Ford Intake Manifold Kit 154-2101Intake Manifold Bolt Kit SB Ford 12ptARP rugged, black oxide coated chromoly 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 consistent torque loading. Socket Size(s): 3 8 12ptThread Size: 5 16 in. 18Washer Included: Yes