WTB - 1970 442 W and Z exhaust manifold

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June 2nd, 2022, 07:01 PM

cdoering

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Join Date: Apr 2012

Posts: 588

WTB - 1970 442 W and Z exhaust manifold

Looking for a nice original pair of W & Z exhaust manifolds with no cracks. I'll be at homecoming and the Olds Nationals if can deliver. Let me know what you have for sale.

Sorry title says X & Z (typo error)

Last edited by cdoering; June 3rd, 2022 at 10:26 AM. Reason: correct part needed

June 3rd, 2022, 09:58 AM

11971four4two

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Join Date: Feb 2011

Location: minnesota USA

Posts: 6,760

I have an NOS new GM never bolted on a car , Right side manifold Letter Z passenger side that I could sell

June 3rd, 2022, 10:05 AM

joe_padavano

Old(s) Fart

Join Date: Mar 2007

Location: Northern VA

Posts: 47,735

Quote:

Originally Posted by cdoering

Looking for a nice original pair of X & Z exhaust manifolds with no cracks. I'll be at homecoming and the Olds Nationals if can deliver. Let me know what you have for sale.

Correct 1970 442 manifolds are W (casting no. 402295) and Z (402294).

There are three different "X" LH manifold castings, all different.
389269 is 1965-68 A-body with 400
406301 is 1971-72 full size with 455
412287 is 1973-74 455 with dual exhaust and is the only one of the three with internally divided runners like the W casting.