Inline Tube Compatible with 1969-74 Pontiac A-Body F-Body Ram Air Header Type Aftermarket Exhaust Manifold Bolts and Locks 15pc

1964-79 III, IV or HO & SD Exhaust Manifold BoltsV8 Kit 15pc For Reproduction, aftermarket or factory originalsManifolds - If you have factory manifolds you would have a couple of extra bolts This set is for all cars with the Factory exhaust manifolds ( these are the big style header type manifolds for the high performance cars)This set includes11 factory correct manifold bolts and 4 lock brackets. Enough to bolton one set of manifolds. These are for all V8 engine exhaust manifolds,NOT the small manifolds. These will also work on all the aftermarket exhaust manifolds but you may have extra bolt or two depending on who's you buy. With our manifoldsthere will be no extra bolts. This bolt set has the exact head markings and lengthof the originals made to grade 8 specifications. Grade 8 is a hardened steel bolt which means when you go to take them out 10 years from now they come out instead of breaking off. If you are doing a concourse restoration this kit is a must. The originals are always rusted and pitted from getting hot and cold hundreds of times. The set also comes with the lock washers that were only used on the end bolts. The Locks goon the larger holes. If youlook the manifold not all the bolt holes are the same size - the larger holes get the locks.The locks are not on every hole. From the factory these manifolds would get very hot and expand and contract. The larger bolt holes required the locks because the bolts were not as tight as the rest so the manifold could expand with out cracking.