My'03 Warrior is bone stock and I just ordered a FMF T4 Full Pipe System (hi flo header, t4 mid pipe, t4 14 inch muffler), will this make a huge power gain? I can't find any dynos for this application anywhere even at fmf's website.

 

You'll see an increase in horsepower but you really need to add an aftermarket filter like K&N and rejet to get the full potential from the pipe.