I'm with ya man! I put on my D& D bolt on (after much deliberation amogsnt the threads), and I SWEAR, the wheel comes up ALOT more easier. Smoother power delivery? Perhaps. A bit more HP? Perhaps. I dunno..but all I know is the bike DEFINATELY has a more predictable powerband with little, if any, dead spots.
I Love it. Glad to hear you like the Two Bros. Maybe next time I get a bolt on with another bike, I'll explore the Two Bros pipe.