What is an effecient (power-wise) pipe for running 310-350 Pro-x cylinders? Right now I'm running a FMF Fatty and wondering if it will even be adequate to run if I'm opening everything up in the motor and keeping that the same - I assume not. But who makes a better pipe for this size motor, my bike configuration and with mid-top end ESR porting? Is their ESR ATC5 pipe any better? All suggestions welcome.

that FMF fatty should do fine, i havent heard of many custom pipes except the drag racing pipe

I'll be running a dg pipe with my 285cc big bore and was told it would be fine.....bigger carb though.

i will be runnning a 38mm air stryker on a 310 (295cc's) pro x. i havent narrowed down an exact compression but i want 220psi.