Quote:
Originally Posted by jhein
Butler has a warning about using them with headers.
"If using headers, ceramic coated headers are highly recommended AND/OR a heat shield or header wrap to keep heat away from the Poly mounts as excessive heat may cause the poly to melt or deteriorate."
I have about 1700 miles with RA manifolds and no problems.
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Yeah, I saw that warning too.
Mine have been on the car for a few years now with 1 7/8 headers. One of the tubes is 1/8 inch, at best, from the metal mount frame on the pass side.
I have at least a few thousand miles on this thing. It`s not a daily driver but I do use it as much as I can. And it gets used in the hot ambient temps we usually have down here.
I look at em at oil changes since my a$$ tightened up after seeing the warning. So far, I see nothing. No bulging, cracking, etc.