I have a set of II towing twins for my '03. I am going to be running Flux 3's and dual pumps. Will the 62/K31 set up be big enough? Or should I sell them and go bigger. Is it possible to put a S400 in place of the K31 without having to do alot of modifications? Thanks

 

What programming or boxes are you running also? It really depends on how much fuel you are feeding to those injectors with programming or boxes. With mild programming, it'll be ok the way it is. If you are going to run a Smarty and TST with those injectors( or something close), then swap in the S400.