You are opening up a can of worms on this one. There are several websites devoted to darksiding. (Riding on the Darkside has a section devoted to Victory.)Yes, it can be done on the CORE based bikes.
Void the warrantee? If your dealer thinks it will, go to another dealer, IMHO.
D&D pipes, PCV, Llyodz performance filter w/strip in place, Llyod's timing wheel (set +4) and various other visual do dads. :cool: