The stock exhaust manifold will flow all the volume those tiny ports are able to produce. Does putting bigger links on one end or another of a chain make the whole chain stronger? The same principle applies to putting high-flow parts on either end of a restriction- - - -no net gain.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!