Now, that's funny! Haven't quite had that experience but I'm sure it's just a matter of time
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I honestly don't know who made the exhaust. It came with the bike in a separate box with essentially no labeling (hanger brackets say Force-G on them) on the headers or the CF mufflers. The header pipes are slightly larger in diameter than the stock system and there's less restriction where the pipes come together... and the airbox is opened (no snorkels).
It was running rich with the stock setup and choppy at low rpm's. I ran some Seafoam through it, changed the plugs and installed the spaghetti system at the same time. I suspect this is what the carbs were jetted for. No more black plugs and it goes like stink. Still a bit choppy at lower rpm's but much better than it was. I suspect some of that is the nature of the beast.
As stated above, the way it makes power is just intoxicating. My Triumph Bonnie was a 900 also, but a complete bore to ride by comparison. This bike is torquey as heck and a riot to ride. Brakes are like the hand of God himself. Love love love this bike!