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Pair of original 1965 -1967 W29 W30 Oldsmobile Olds 4-4-2 Big Block "X" (casting number 389269) & "W" (casting number 389268) Dual Exhaust Manifolds. Will fit all 64-75 400 425 & 455 oldsmobile big blocks. They are numbers matching factory replacements for 65-67 442's. Very good original condition. Nice clean threads. I don't see any pitting, cracks or fractures anywhere on them. The original heat riser assembly appears to be functional. Ive had these in dry storage for almost 30 years. They should clean up very nicely. It appears that the bolt mounting flange on the "X" was welded & reattached at some point (see last 2 pictures). Selling as is. Thank you