Denso R-S11 Resistor U-Groove Spark Plug

DENSO's patented U-Groove spark plug enables complete combustion by allowing the spark to fill the gap created by the U shape. The ball of fire created in the U-Groove develops a larger and hotter flash front that virtually eliminates excessive fouling and erratic starts caused by poor fuel mixtures.

Even DENSO's "standard" spark plug is something special. The innovative design that helped to make DENSO spark plugs famous, the U-groove plug employs a unique, channeled ground electrode designed to generate a larger spark nucleus at the point of ignition. Greater spark energy than ordinary plugs means improved flame travel, producing more complete, consistent, and efficient combustion.

Vehicle Fitments:

Year	Make	Model	Submodel
1981 - 1988	Dodge	Colt	Base
1981 - 1983	Dodge	Colt	Custom
1982 - 1983	Dodge	Colt	Deluxe
1984 - 1988	Dodge	Colt	DL, E, Vista
1985 - 1988	Dodge	Colt	Premier
1986	Dodge	Colt	Vista Custom
1984	Dodge	Power Ram 50	Royal, Sport, Custom
1987 - 1989	Dodge	Ram 50	Base
1984 - 1989	Dodge	Ram 50	Custom, Sport
1984 - 1985	Dodge	Ram 50	Royal
1983 - 1984	Mitsubishi	Cordia	Base, LS
1983 - 1988	Mitsubishi	Cordia	L
1984 - 1988	Mitsubishi	Cordia	Turbo
1987 - 1989	Mitsubishi	Mighty Max	1 Ton
1984	Mitsubishi	Mighty Max	S
1984 - 1985	Mitsubishi	Mighty Max	SP
1986 - 1989	Mitsubishi	Mighty Max	Sport
1984 - 1989	Mitsubishi	Mighty Max	SPX, Base
1983	Mitsubishi	Starion	Base
1985	Mitsubishi	Starion	ES
1985 - 1988	Mitsubishi	Starion	ESi
1986 - 1989	Mitsubishi	Starion	ESi-R
1985 - 1987	Mitsubishi	Starion	LE
1983 - 1985	Mitsubishi	Starion	LS
1983 - 1986	Mitsubishi	Tredia	Base
1983 - 1988	Mitsubishi	Tredia	L, LS
1984 - 1988	Mitsubishi	Tredia	Turbo
1981 - 1982	Plymouth	Champ	Custom, Base
1982	Plymouth	Champ	Deluxe
1983 - 1988	Plymouth	Colt	Base
1983	Plymouth	Colt	Deluxe, Custom
1984 - 1988	Plymouth	Colt	DL, E, Vista
1985 - 1988	Plymouth	Colt	Premier
1990	Subaru	Justy	GL, DL