Quote:
Originally Posted by madmaxx
I had sidepipes as close as 3/16" and never saw any damage to paint or body. 302 sbc ford
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I think a big part of the answer lies here. The bigger the displacement, the hotter it will run and the more heat it will give off. For instance I have stainless steel pipes with a 302. They turn a slight tan color that will polish out without too much effort. I've seen 351's and up that will turn the same pipes a scorched blue due to the amount of heat exhausted that won't polish out whatsoever. The bigger the engine the more clearance you may need to give them.