Why would the manifold need to be replaced? Is it cracked? If it's warped it can be ground down and if it's cracked perhaps it could be welded? I'll bet that you can find a used one. Do a search in the part discussion for 300SDL parts car. I remember a couple people in the past few months parting out SDL's.

Thanks
David

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2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

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