AA .45 Parabolic Nitro Pipe Get the popular .45 Parabolic Pipe made famous by Andy Brown. This spectacular pipe has had tremendous success on the racing circuit including on-going NAMBA Heat racing records. No matter who the record belonged to the pipe remained the same. It was used to set IMPBA 2 Lap and straight-line records as well. You can't go wrong with the .45 Parabolic Pipe. It's fast. It's consistant. It's reliable.