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Home » Public Forums » GMCnet » Doug Thorley Headers D755Y vs 355YC (Can both headers be used on a 455?)
Doug Thorley Headers D755Y vs 355YC [message #325887] Thu, 09 November 2017 07:22 Go to previous message
Beach Coach is currently offline  Beach Coach   Canada
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Registered: December 2011
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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

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