Update for anyone following this thread and muffler build. It looks like I now own this exhaust, found it on ebay. I just installed and took it for its maiden voyage today. My finding so far:
1) Quieter than stock, or as quiet. May be 5% louder until for first 15 seconds warmup, but then is very quiet
2) Deep pulses of sound. Not as deep as all the other exhausts, but a huge improvement over stock without being obnoxious. Reminds me of a quieter, more mechanical/controlled sound than my Hawk. Kinda like a Hawk with 20% of the sound of a tuned import vtwin thrown in. Lawnmower, no more.
3) Smooth, consistant idle, smooth launch.
4) High rpm is about equal to stock.
5) There's a distinct power dip at 3500-4000 rpm. Upon comparing to my current map tuned to stock muffler with K&N, I found my fueling to be too rich in the center of the map by 10-15%. Maybe even 20% in spots. I've leaned things out for the second run, we'll see how much power it regains. For now though, this exhaust seems to suffer slightly in the midrange. It seems fine on the highway, but the power delivery stalls and the rpms slow in the climb through this region on 0-60 pulls.
I'm correct in assuming less fuel = less air = less power, right? Or is there another variable in exhaust I'm missing?
My guess is that this exhaust will feel identical to stock once tuned, just a hair deeper.
