Set includes seven noid lights for testing GM PFI.FORD TBI,GEO TBI,BOSCH PFI.GMTBI.GM SCPI.GM MULTEC2,BOSCH 2 and two IAC signal test lights for Gm 1982 or newer,GM TBI and PFI.,And GM model 1981 or newer GM model 700 TBI and PFI fuel injection system,and one fibre optic noid lite extension.