Contour Enthusiasts Group Archives Forums Modifications Zetec Maintenance installed nitrous in my zetec today

you dont change the fuel injectors for anything when you install the system...they stay the same unless you want to upgrade...when i raised my shot to 75 i didn't change the injectors cuz i didn't have to...the size of the shot such as 35 50 and 75 is how big the hole is on the jet which determines how much nitrous and xtra gas is sent to my engine.