1985 Southwind P30 Header options
I have a P30 1985 Southwind with a 454. I replaced one of the exhaust manifolds on one side. The other side has to be done. I know everyone recommends to upgrade to the Banks or Doug Thorley headers. ...
Forum Discussion
As far as heat, with a proper muffler - meaning straight through, you should have considerably less heat than with manifolds. The engine does not work as hard to pump all that air out the exhaust, which translates into considerably less heat.
While I understand the motivation for cheap, the one issue that will be hurt with cheap headers is noise. Cheap means thin wall pipe, which then radiates more noise than manifolds or thicker headers. Even Banks are which are thicker than cheapo, but still thin, radiate more noise than manifolds. Thorleys are thicker pipe, so they have less noise, and by experience, make less noise than standard manifolds at cruise. H or X pipe will also reduce noise and of course help low end performance). Generally speaking, a Tri-Y has a broader power band, so it is more suitable for RV use than 4 into 1.
While I understand the motivation for cheap, the one issue that will be hurt with cheap headers is noise. Cheap means thin wall pipe, which then radiates more noise than manifolds or thicker headers. Even Banks are which are thicker than cheapo, but still thin, radiate more noise than manifolds. Thorleys are thicker pipe, so they have less noise, and by experience, make less noise than standard manifolds at cruise. H or X pipe will also reduce noise and of course help low end performance). Generally speaking, a Tri-Y has a broader power band, so it is more suitable for RV use than 4 into 1.
