These are not the same 305 HP 4V motors that are in 96-98 or 99-01 Cobra's They are severly underrated do to the 320 claimed hp that the 99's got and did not make, they are a 270+ RWHP compaired to a 255+ RWHP. MM and FF tested the Mach1 Vs. GTO and it is a drivers race the GTO has more power...