I ran the powerlite pipe, y-pip, and Skinz Ultra-Q can on my 06 M7 and really liked it; I ride 0-3000 ft and did not have to get a fuel controller. This pipe is more give more torque, but also gave me more top end MPH on the trails. I did the 10.4 secondary upgrade with this mod as well,....my setup ripped.
The Monster pipe is popular for 800 BB guys, more of a top-end pipe on a stock 700 laydown. The 800 big bore guys need the extra flow, so this pipe helps them. I am not sure about the drag pipe, sounds like something for the Lake-racer Crossfire guys.
Make sure when you order this you specifically ask for the newest version of the lite pipe, they had some issues with the early versions not making good power. The only "Old" versions that are out there will be found on Ebay or used for-sale boards.
John