CIS Fuel Injection Components Also called K-jetronic, this fuel injection system was used on six cylinder Porsche® after MFI, from 1973.5 to 1983 on the 911, and to 1994 on the Turbo Porsche models. We can exchange many of the Bosch warm up regulators and fuel distributors for a rebuilt unit from our shelf! Just send in your rebuildable core first. (For some models, we will need to rebuild yours). If you don’t have a core, check out our digital models for the 911 and the 930.