I dont like to vouch for my f7 since I have nothing to compare, but any right hand will be much improved. I got mine from here http://www.factory7atv.com/PBstore.htm but your better off to find used if you can.
pittboss45 did post this though on pbforums
"We tested many pipes out there for the blaster and found that the biggest gains came from the one that we put our name on, Factory 7. If the dyno port would have come out on top, we would be selling more of them.
They both will give you more than the stock pipe but the dyno port doesn't chrome the tail section and it looks a little rough after a while."
the lrd is expensive off ebay.
cheaper to buy a dynoport, but no one has mentioned the vitos pipe.
when i buy my new pipe here(hopefullysoon) for my big bore im going with a dyno port or a vitos fatbastard
If you hear the names factory7, power pros, phantom, trinity, and ct racing they are all the same exact pipe. It must be pretty good if they sell it under 5 names lol.
The pipe will depend on what your riding style is.
If you going to be only trail riding then go with Shearer pipe. If your going to be circle track racing, road racing, drag racing friends and want max power; then go with the Vito pipe it spins out to 10,300 to 10,500
It makes great peak power; but if you want the bottom end power for the trail then go with Shearer pipe.
I sell the Shearer pipe for $290
Of all the pipes I have tested on my dyno jet; there is no better pipe for the trial then the Shearer pipe
Thanks http://www.flickr.com/photos/kennedypower/