a performance exhaust is THE BEST upgrade you can do to your blaster. For some reason performance exhaust's add ALOT of power to a blaster, it wakes your blaster right up.
Anyways it also depends on how much money your willing to put down on the exhaust. Alot of people have fmf because its very inexpensive compared to other brands.
Well you say youd like to go mid range, Id go with the F7, has great ALL AROUND power, unlike pretty much every pipe, the F7 adds great bottom and mid power, it also has excellent top end. the F7 is pretty much an ALL AROUND power gain - great exhaust
Project Blaster - Online Store
theres the LRD exhaust, this is another GREAT exhaust, designed for better throttle responce and mid range with a huge increase in top end performance.
Project Blaster - Online Store
theres the power pros exhaust which is the exact same thing as the F7.
then you have the toomey B1, pro circuit, fmf, DG - these are the less expensive exhausts but dont perform as good as the ones listed above. Id say out of these 4 the toomey b1 is def. the best.
toomeyb1 -
Toomey B-1 Pipe Kit | Rocky Mountain ATV/MC
fmf -
Two Stroke Pipes | Exhaust | Rocky Mountain ATV/MC
Theres also the DMC alien, ive heard great things about it, sapossed to give performance increases like the f7 and lrd, but its not as pricey.
DMC Alien Complete - Blaster
dont choose your exhaust by the price, you have to think of the type of riding you do, and the type of rider you are (agressive or not) and choose an exhaust best fit for ya, not best price for ya, then when you choose a certain brand, then you go and find the best price for ya hahaha.
shoot me a pm if you have any further questions, and i also have a thread in the "engine" section stickyd at the top with a bunch of dif. sound clips of different blaster exhaust. heres a link to it -
http://www.blasterforum.com/engine/2469-i-need-sound-clips.html
hook it up with some "rep"