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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="Shaun@AED" data-source="post: 14790212" data-attributes="member: 32381"><p>I do not know of any header manufactures that do 1.5" primaries, but I do know Kooks makes 1 & 5/8th" for the coyote.</p><p></p><p>FWIW CPR uses 1.5" primaries with his turbo kits and we recently made over 1000RWHP SAE corrected with his kit at 16Psi. The 1.5" primaries we not a restriction even at that high power level.</p><p></p><p>The more important aspect of headers is the collector design along with the primary length as a proper setup will take full advantage of the blowdown pulse for a power boost at the appropriate RPM. And of course the unique firing order of the coyote means special attention with primary lengths.</p><p>But that would be a different discussion/thread.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 14790212, member: 32381"] I do not know of any header manufactures that do 1.5" primaries, but I do know Kooks makes 1 & 5/8th" for the coyote. FWIW CPR uses 1.5" primaries with his turbo kits and we recently made over 1000RWHP SAE corrected with his kit at 16Psi. The 1.5" primaries we not a restriction even at that high power level. The more important aspect of headers is the collector design along with the primary length as a proper setup will take full advantage of the blowdown pulse for a power boost at the appropriate RPM. And of course the unique firing order of the coyote means special attention with primary lengths. But that would be a different discussion/thread. [/QUOTE]
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Exhaust
Long tube headers, which Primary size is 'best'?
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