Hardly used set of Jesel roller followers and Lash posts... 30-40hp extra.. super high rpm...no more spit followers as these will not come out... solid lash posts with shims.. will fit any 2v/4v mod motor if you get new lash post/adjusters tops etc... this setup is for a 5.4 shelby....comes with some spares... shims, etc... these will only work with solid lash adjusters not hydrualic... remove the followers without removing the cams as there is a clip on the side of them.... will work on cobra motor if you buy 16 more smaller lash posts.. you need to talk with your engine builder if your intested..