I'm a little disappointed in my protuned VF34. It has a torque curve from the low end that matches what my TD04 was putting out. According to my dyno runs at least. It works great as a DD since power in the low end is basically the same though with just a little more up top. I don't think I would consider going smaller than a 16g if I did it again... PERIOD. 16g XTR (38lbs/min) will be the next turbo for sure. Another 100cfm over the VF34 and about 160cfm over the TD04.