Re: Mopar Performance Fuel Rails part#5153783. Evidently this part was made available back in 07 but was recently canceled by Mopar, does anyone know why? This part would instal on 5.7, 6.1 & 6.4 motors and would replace your existing stock set up. Does anybody have these on their car right now? They look pretty trick but do they add any real performance to equation or are they just a dress up item only? Thanks!