Intake Manifold Bolt size(s)

Factory intake bolts all have captive washers on them and are all the same length. Just a bit shorter than 2". If you're buying new bolts, just get some that are 1 3/4 not counting the bolt head and use flat washers on them. Use thread sealer on every bolt! Every one of them thread into areas with oil splash and oil will wick up the threads of the bolt and puddle up under the bolt heads onto your intake if you don't seal them.