Denso FPR-U 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
1971 - 1974	Opel	1900	Base
1971 - 1972	Opel	1900	Rallye
1973 - 1974	Opel	Manta	Base
1971 - 1973	Opel	Opel	GT
1977 - 1979	Renault	LeCar	GTL, TL
1968 - 1971	Renault	R10	Base
1976	Renault	R5	TL, GTL
1960 - 1961	Triumph	TR3A	Base
1962	Triumph	TR3B	Base
1962 - 1968	Volvo	122	Base, S
1968 - 1974	Volvo	142	Base, S
1971	Volvo	142	E
1974	Volvo	142	GL
1968 - 1974	Volvo	144	Base, S
1974	Volvo	144	GL
1968 - 1974	Volvo	145	Base, S
1970 - 1975	Volvo	164	Base
1973 - 1974	Volvo	164	E
1970 - 1974	Volvo	164	S
1961 - 1968	Volvo	1800	Base
1969	Volvo	1800	E
1964 - 1969	Volvo	1800	S
1975	Volvo	242	GL
1975	Volvo	244	GL
1975	Volvo	245	Base
1962 - 1965	Volvo	544	Base