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Too much back pressure (too small of exhaust outlet). What size output is too small?
On a 911SC with headers and a "non-disruptive" muffler (just a case muffler, without baffles disrupting the flow of exhaust like a maze) and no catalytic converter, how small of an exhaust output is the smallest one can have without damaging the engine, such as by causing too high of a temp at high rev levels, perhaps causing it to burn exhaust valves?
Last edited by octanemaestro; 02-19-2017 at 10:50 AM..
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