FORD 429 460 V8 BIG BLOCK INTAKE MANIFOLD GASKET SET # MS15171FORD 429 460 V8 BIG BLOCK INTAKE MANIFOLD GASKET SET # MS15171 Gaskets, Intake Manifold, Ford, Lincoln, Mercury, Big Block 385, Set Gasket Material: Composite Port Style: Stock Upper Intake Manifold Plenum Gasket Included: No Quantity: Sold as a set. Mahle Original Intake Manifold Gaskets Common symptoms of poor intake manifold gasket sealing may include leaks, rough idling, and stumbling. For your next engine build, use Mahle Original intake manifold