My best sounding exhaust had a cat, a Dynomax perforated core resonator, a Moroso spiral core resonator, and an Apex-i WS2 muffler. This was on a big crammed (C3) DE revving to 9k and not a VE, but big lobes on a ported head can't be far from the VE experience. I didn't get really loud until past 7500, similar to what happens with VVL
Last edited by happynole
on 2015-03-07
at 18-01-15.
Reason: corrected spelling