"None of the above"- - - - -A stock exhaust manifold with a properly functioning heat riser system and a "split" exhaust works better than anything dreamed up by Fenton- - - -particularly the offshore repops that only look like the original Fenton manifolds.
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!