Had my TBR exhaust on my '06 Wee for a couple rides now so I figured I might as well write a review for it, in case anyone was interested.
Intro: Why did I buy this one? There are numerous exhausts for these bikes, at first I was looking at the Dominators on Ebay for the price. Scorpions were the next step up, but while I've heard good things, they retained the big ugly(my opinion) black heat shield behind the passenger pegs. For about $100 more is the TBR system. They call it a 3/4 as it uses stock headers, and replaces the mid pipes/2-1 and muffler. Next step up is Leo's at more than $100 over the Two Bro's, and Akra's, Remus, etc well over that price. So it was the cheapest system, not just slip on, so I went for it.
Initial impressions: Opening it up the can(I chose aluminum, the cheapest) is nicely polished, the tip is Magnesium and looks good. Welds on the stainless pipes were beautiful, and the bends were very clean. It definitely doesn't look like the stock exhaust!
Installation: Old exhaust came off easily, with the exception of the rear cylinder clamp, which is in an awkward spot, was a little rusted, AND uses an allen-head bolt, as opposed to a 12mm bolt like the front cylinder clamp. New pipe went in pretty easily following the kinda crappy instructions. Came with new clamps and 1 or 2 bolts, which was nice. But you had to re-use a couple bolts and washers, which wasn't a big deal, but annoying. I didn't weigh it, but I know it shaves a few pounds off the bike, stock exhaust is heavy!
Sound: First let me say that what sounds good, and what sounds loud or quiet is very subjective. I tend to fall "middle of the road", I don't like super quiet stock exhausts, especially on v-twins, but I also don't want to ride around and wake people up at night.
I find this one has a nice and deep rumbly tone at start-up, idle, and off idle. Higher revs sounds nice and aggressive, but I don't find it to be obnoxiously loud. Cruising at 55+mph I can hear it a little over wind noise, and it is more noticeable while accelerating. Though one of the optional sound baffle inserts would likely help for that. It is a lot quieter than my last bike, which was a Ducati Monster with Remus pipes. Which would easily set off car alarms.
Power: As to be expected with any exhaust, no noticeable power increase.
Overview: It is exactly what I was looking for. Nice aggressive tone, loud enough to excite my inner hooligan, but I don't find it offensive (I also don't do much long distance freeway riding for hours, like I know many do). Looks fantastic, quality seems great. I can definitely understand how some would find it too loud for long trips, but for my desire and riding style it works.
I'll gladly answer any question you have. Thanks for looking!