Our little bikes with it's single cylinder don't really gain a whole lot by upgrading the exhaust.
You lose some weight and gain some power.
There is no hard and fast rule or law that says exhaust "X" gives you the best power and weight for your dollar.
Many here use many pipes. Nobody really complains.
FmF Q4, FmF Powercore, GYTR, HMF, Yoshimura, Barrell Four,Leo Vince,Graves......find the one that meets your price points and sound requirements and you'll be happy.
Which one is "best"......what's the best ice cream, best pizza, and best beer?
For me, the best was the FmF Q4. You may have different tastes and needs.
In the previous post I was being kinda saucy....
_________________
2008 WR250X
Gearing: 13t - 48t
Power Commander 5 / PC-V
Airbox Door Removed - Flapper glued - AIS removed
FmF Q4
Bridgestone Battlax BT-003rs