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
1976 - 1983	Honda	Accord	Base
1978 - 1983	Honda	Accord	LX
1981 - 1983	Honda	Accord	SE
1975 - 1979	Honda	Civic	1200, CVCC
1980 - 1981	Honda	Civic	1300 DX
1982 - 1983	Honda	Civic	1300 FE, Wagovan
1980 - 1983	Honda	Civic	1300, 1500 DX
1980	Honda	Civic	1500
1980 - 1982	Honda	Civic	1500 GL
1983	Honda	Civic	1500 S
1981 - 1983	Honda	Civic	Base
1983	Honda	Prelude	Base
1984 - 1987	Honda	Wagovan	DX