ARP Intake Manifold Bolt Kits | Multiple Ford Fitments (154-2004)Intake Manifold Bolt Kit by ARP ARP 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. These bolts are available with either hex or 12 point heads, and washers are included. Features Thread