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Old 12-21-2017, 12:18 PM
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Default Anyone ever see this before?

This just showed up on e-bay. I had seen the cast dump elbows for the cast tri-Y headers but had never seen one for the stock manifolds. Wonder where the left side is.
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Old 12-21-2017, 12:34 PM
Chief of the 60's Chief of the 60's is offline
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Turbo 301?

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Old 12-21-2017, 12:45 PM
694.1 694.1 is offline
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That is a Tri-5 manifold with single exhaust. The pipe crosses from the driver's side to the Pass side. Manifolds for the 3 '55,'56 & '57/'58 are each different.

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Old 12-22-2017, 07:20 PM
U47 U47 is offline
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Looks like the rt. bank exhaust manifold of 1959-60 389 single exhaust; but I've seen them on 55-56-57 but different. Starting in 61 they brought the left bank tube over and welded it to the rt side.
http://i281.photobucket.com/albums/k...c/DSC02449.jpg


check this out:
http://www.pontiacsafari.com/MPC/Pages/page_0178.jpg


Last edited by U47; 12-22-2017 at 07:35 PM.
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Old 12-24-2017, 11:04 AM
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Interesting thread.

Thanks, pfilean, for starting it.

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Old 01-03-2018, 02:23 PM
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Learned something today, good thread.

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Old 01-03-2018, 06:14 PM
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Quote:
Originally Posted by 694.1 View Post
That is a Tri-5 manifold with single exhaust. The pipe crosses from the driver's side to the Pass side. Manifolds for the 3 '55,'56 & '57/'58 are each different.
Similar to Oldsmobile's funky crossover setup on some of their engines, which they used for a long time...

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