These exhaust manifolds are exact replicas of theoriginal 1970-1972 Oldsmobile 455 W&Z manifolds. They bolt right up to the motor with no issues. They can even be bolted up with no gaskets just like the factory did. These manifolds were also used on the 1969 big blocks; they only different is that the left hand manifold has a heat riser, which is alsoavailable.They are highly detailed for show quality restorations. Left hand manifold, W, is stamped with the part number 402295 and right hand, Z, is stamped 402294. These manifolds will also fit onto any big block 400, 425 and 455 A body cars from 1965 to 1972.
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THORNTON REPRODUCTIONS832 MINE ROADQUAKERTOWN, PA 19844610-282-2494
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