Replacement manifold bolt short, with the same hardness in the steel as the original. The function is like an original bolt that is used to screw the manifolds to the cylinder heads. The length of the bolt is approx: 57mm measured under the skull. There are 5 of these longer bolts per car.
Tip!
Clean the threads in the cylinder head with a thread tap if the bolt feels heavy when you screw it in. The thread is 3/8″ UNC.
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