dgoodhue said:You will need a new chip to match the injectors, IT WILL NEED TO be a custom tune.
TwinTurboV8Ty said:There is one on code59 that is better than anything that has been in the past, but that doesn't mean it will just work on your truck which could and probably does have a different combination.
dgoodhue said:Agree. Their are few different brands of 40#, 42# injectors out their as well, and none of the injectors are linear to each other (ie need different part throttle fuel maps).