Good used v6 manifold fit Buick v6 marine engine, are not cracked, any questions ask, these things are a little bit heavy will help in assist in shipping for $45 put on a pallet strap down, would prefer R AND L CARRIERS, they work very well with me, I will send bill of lauding, buyer pays for shipping. THESE are a very nice set of manifolds, very expensive hard to find. They have been pressure tested. Be sure these are what you want before you bid. Ask questions. Thanks for looking.