| Re: [GMCnet] Doug Thorley Headers D755Y vs 355YC [message #325889 is a reply to message #325887] |
Thu, 09 November 2017 10:19   |
powerjon
Messages: 2446
Registered: January 2004
Karma:
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Senior Member |
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Hugh,
The one that has been used over the years has been the 355YC version and it does have the thicker tubing which is what you need. Unsure that thorley headers are still in production, Jim K now markets the Doug's headers and both ceramic and SS headers are available and the price difference is small.
http://www.appliedgmc.com/prod.itml/icOid/1610
http://www.appliedgmc.com/prod.itml/icOid/672
Contact Jim with your questions.
JR Wright
GMC Great Laker MHC
GMC Eastern States Charter Member
GMCGL Tech Editor
GMCMI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan
> On Nov 9, 2017, at 8:22 AM, Beach Coach wrote:
>
> Can anyone clarify which header; the D755Y and/or 355YC; can be used as replacements for the exhaust manifolds? The only difference between the two
> headers is that the D755Y is made with 16 gauge steel and the 355YC is made with 14 gauge steel. The sales specs for both headers are stating that
> they are a fit for the GMC Motorhome 1973 - 1978.
>
> Thanks
>
> Hugh MacDougall, Antigonish Nova Scotia Canada, 1975 Eleganza II
> --
> hugh MacDougall
> Antigonish, Nova Scotia
> 1975 Eleganza II, 1977 Trans Mode
>
>
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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