THe only way the stock fans might fit is iff you cut them down. Don't do that. THey won't be effective and they could easily melt. Get the Fal, thats what i have too. Also, the downpipe that i got did not reach all the way to the rest of the exhasut system. An easy fix to that was to cut a small peice off the stock headers downpipe and weld it to the Rev Hard Down pipe.