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Paul Workman · 02-22-2021

The origin of the "X-pipe" for our cars was Al Dashto and Pete Polatsidis (of Fast Boys of Illinois, [aka FBI fame]), IIRC. Experiments with his car's LT5 showed a 25 hp gain on the (inertia) dyno as result. Later Stainless Works picked it up and then B&B and others picked it up now.

Yes, it drones. But, one can avoid the 1800-2200 rpm resonance region with gear selection...most of the time. Ad for the added zip it is worth the aggravation (I hardly notice it anymore - have adjusted my driving habits so as to avoid it. Besides! It is music to my ears and to wife Ami's as well [she has her own ZR-1 with the B&B exhaust and "X-pipe"])

I hear that B&B's "FUSION" cat-back is one way to go and avoid drone. AND, then there is the CORSA cat-back which uses resonant cancellation techniques to get rid of drone (w/o sacrificing performance).

02-22-2021	#3
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: X pipe replacing the middle muffler? The origin of the "X-pipe" for our cars was Al Dashto and Pete Polatsidis (of Fast Boys of Illinois, [aka FBI fame]), IIRC. Experiments with his car's LT5 showed a 25 hp gain on the (inertia) dyno as result. Later Stainless Works picked it up and then B&B and others picked it up now. Yes, it drones. But, one can avoid the 1800-2200 rpm resonance region with gear selection...most of the time. Ad for the added zip it is worth the aggravation (I hardly notice it anymore - have adjusted my driving habits so as to avoid it. Besides! It is music to my ears and to wife Ami's as well [she has her own ZR-1 with the B&B exhaust and "X-pipe"]) I hear that B&B's "FUSION" cat-back is one way to go and avoid drone. AND, then there is the CORSA cat-back which uses resonant cancellation techniques to get rid of drone (w/o sacrificing performance).