I own a 2001 warrior. If i were to add whitebrother pipes give me any added power?

 

Sure, Most any good pipe will give you better performance. The question is, where do you want the additional performance,,,low, mid, or top end?
The WB and the Supertrapp pipes are tunable so you can select the part of the band you wish to improve by adding or removing discs from the silencer, thus increasing or decreasing exhaust flow. Which ever pipe you choose will no doubt require rejetting in order to maintain correct fuel/air mix & prevent a lean condition.