The B5 makes more power in the low end and midrange then even a Picco..So its not lacking bottom by any means...right off idle it has great pull, at 15000 RPM the engine is already making 50 oz/in of torque, I don't know how much more low end you could want.... If someone has a B5 lacking low end I would be looking for the propblem with the setup,tune ,clutch or engine, as a properly tuned and setup B5 is a beast down low...