Originally Posted by Nick M

Been around for 15 years in road course, drag, NA applications, hondas, turbo subarus - new here but not 'new' at all. But I am glad to be here, enjoying my 370z very much.

I'd bet you lunch a pair of shorty headers on an otherwise stock 370z exhaust would increase in DBs at WOT under load. And it would only be further amplified by a midpipe + short tails. Exhaust components tends to be synergistic especially when it comes to scavenging and cfms.

The thin wall tubing alone would add noise

But...yes I would imagine that the long tubes are always going to be superior, stuffing a clumsy collector closer to combustion rarely makes power unless there is a snail attached to it, but OP just wants noise :P