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Mustang Forums
2011-2014 Mustangs
Exhaust
Long tube headers, which Primary size is 'best'?
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<blockquote data-quote="JonnyW" data-source="post: 14794639" data-attributes="member: 147644"><p>I'm partial to Kook's equal length headers and would think these would be the most effective design as well as the most efficient. They are indeed mid length, but give the best of both worlds in low end torque and high end power. The headers also feature merge collectors to center the exhaust and reduce turbulence. StainlessWorks claims that equal length headers changes flow characteristics, but primaries will have bends even without being equal length. What isn't mentioned is that theoretically there would be more drastic flow change if the exhaust from the primaries t-boned eachother in the collector. Thus came the invention of equal length headers. I still agree with 1 3/4 for full bolt-ons, and 1 7/8 for full bolt-ons + cam or supercharger. 2" sounds like total overkill unless serious power is being made ei. 1500+hp</p></blockquote><p></p>
[QUOTE="JonnyW, post: 14794639, member: 147644"] I'm partial to Kook's equal length headers and would think these would be the most effective design as well as the most efficient. They are indeed mid length, but give the best of both worlds in low end torque and high end power. The headers also feature merge collectors to center the exhaust and reduce turbulence. StainlessWorks claims that equal length headers changes flow characteristics, but primaries will have bends even without being equal length. What isn't mentioned is that theoretically there would be more drastic flow change if the exhaust from the primaries t-boned eachother in the collector. Thus came the invention of equal length headers. I still agree with 1 3/4 for full bolt-ons, and 1 7/8 for full bolt-ons + cam or supercharger. 2" sounds like total overkill unless serious power is being made ei. 1500+hp [/QUOTE]
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Exhaust
Long tube headers, which Primary size is 'best'?
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