ARP 454-2101 stainless steel 12 point Intake Manifold Bolts & washers 12 bolts & 12 washers. ARP stainless steel intake manifold bolts are 15 percent stronger than Grade 8 steel bolts and have a wide-area flange for better load distribution. They also have precision-rolled threads, which prevent galling and promote more consistent torque loading. These bolts are both corrosion and heat-resistant and come highly polished.
