imho...dont get the double spoiler.  #1, they dont go with the 99-04 body style like earlier years (94-98)....#2, they are pointless...and #3, they just dont look good in general...on any car.  I ask that you please reconsider.  Mach 1s are already made to look like something.....a mach 1.  they look great as they are and should not be molested visually. (maybe some wheels)

to each their own i guess.  do what suits you, what you like.... 

just giving my honest opinion.