What are you trying to accomplish? BAP are commonly used in other vehicles but not so much our cars. The GN version of a BAP is to "hotwire" your fuel pump and the kit can be bought at many of the supporting vendors.
I know they were popular for a while but in the srt8 jeep world people are trying to get away from them. With technology moving as it is, it cost as much to either upgrade the fuel pump or get a second as opposed to just boosting it. I know the kenne bell's had alot of problems where they would pop a fuse at WOT and it was by by motor. I'd say tell your friend to look around and see how others have managed whatever problem he has besides a BAP