I tried a lot of pipe. I actually own 4 make: FMF sst, toomey t5, procircuit platinium with 304 silencer and shearer sb inframe.
For a stock banshee, the procircuit it's the best according to me and the dyno
for a stock , mid or heavy mod banshee, the t5 it's very very good, but not the best, but this pipe it's good with all set-up
For heavy mod, shearer it's the best, with more than 200degree exaust duration
the fmf it's a good pipe, very more power than stock, but not the best pipe on the market, but the chrome last long, according to me.
it's my opinion
banshee qc