Passenger Cars and Commercial Vehicles

CHEVROLET

Model Engine Year Standard Plug Gap (mm) Iridium Power Iridium Tough
110 cu.in (LUV), K820  LUV 4 Cyl. 1970 to 1975 W20EPU 0.8 IW20 VW20
110 cu.in (LUV), K820  LUV 4 Cyl. 1976 to 1978 W20EPRU 0.8 IW20 VW20
Except “W” Series   6 Cyl. 1954 to 1962 W20SU 0.9
“W” Series   6 Cyl. 1958 to 1962 W20ESU 0.8
2.0, 2.5 Ton HD 2.0L, 2.5L  6 Cyl. W20SU 0.9
C20, C30, C50, C60   8 Cyl. to 1975 T16RU 0.9 ITF16
V8 Except “W” Series   8 Cyl. 1954 to 1962 W20SU 0.9
V8 “W” Series   8 Cyl. 1954 to 1962 W20ESU 0.8
V8   8 Cyl. 1970 on W20ESU 0.8
2.0, 2.5 Ton HD 2.5L, 2.0L  8 Cyl. W20SU 0.9

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