lancemb Posted May 30, 2009 Share Posted May 30, 2009 Well, I purchased what was supposed to be a left side NOS 57-58 exhaust manifold for a dual exhaust; well it isn't. The one on my car is about 9.5" longer coming back to the exhaust pipe. Can anyone confirm that in fact this is correct for a 57-58 single exhaust? There is a number 23 cast in middle and then a casting number in the back of 1186505-2. If it is, is this extra length of pipe the only difference? Is sure appears to be the same otherwise, from what I can see...It sure looks like this is in fact a left NOS 57-58 manifold, which is still quite valuable, but not what I need. I am trying to confirm so that I can decide whether to 1)resell it and buy the correct one (if I can find one) or 2)if the only difference is the extra 9.5" length, install it and install an extension onto the exhaust.You're help would be appreciated! Link to comment Share on other sites More sharing options...
Guest 40series Posted May 31, 2009 Share Posted May 31, 2009 Lance, It is a left side but not a dual exhaust. It's a single. Link to comment Share on other sites More sharing options...
Guest Scott Roberts Posted June 2, 2009 Share Posted June 2, 2009 I beleave that the manifold you have falls in the 59" range I think the on you are looking for looks like this one wich is a #1171945. This is the manifold we bought for our 58 with a single exaust. Link to comment Share on other sites More sharing options...
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