Vortech also makes a nice kit for the 500.
They sure do!!! I picked up Drews A.o. last year with the 500 and the vortech. It is a bitchen set up. Makes 700+h.p. @ 3.5lbs boost. I have 240 hours on it now and have experienced only a drive loss. Absolute checked it out a few months back and everything was as good as new. All 8 cylinders and compression are as good as the day it was new. Tell your bro to put some vortechs on that spectre!