Considered Early/TPI Design Not LS Series/Late. This design is not used on EZ 1.0 or EZ 2.0 Throttle Bodies. Requires a male 2x2 weatherpack to a 4 flat metripack adapter to adapt to a harness designed for 'late model/LS' This sensor is commonly found on TPI engine such as late 80's to early 90's Camaro, Firebird, T/A, Corvette Etc. An Adapter like our 308032 adapts EZ 2.0 multiport to this style IAC. Plugs Direct to EZ 1.0 Multiport Retrofit Harness