AC Delco R45TS resistor spark plug, 14mm tapered seat, gasoline, each

Delco Standard Spark Plugs are precisely engineered and manufactured to provide everyday reliability and efficient performance.

Features:

• A copper-core center electrode that helps provide improved heat transfer to the tip, giving you the reliability you're looking for while improving its resistance to low-speed carbon fouling.
• Hot-tip insulator heats fast and fires hot.
• The nickel-chrome alloy on the ground electrode and center electrode sheathing resists wear from spark erosion and the corrosive environment of the combustion chamber.
• Heat range 5. 

Filtment:

Buick          1968-1991 (most engines)
Cadillac       1993 (Chevrolet 350 engine)
Chevrolet    1970-1992 (6-cyl, small & big block mk. IV)
Chrysler      1978-1983 (inline 6-cylinder)
Dodge         1975-1987 (inline 6-cylinder)
Ford            1974-1985 (Modified, Windsor small & 385 big-block)
GMC            1971-1987 (6-cyl, small & big block mk. IV)
Jeep            1968-1971 (AMC & Buick V8)
Lincoln        1974-1985 (Modified, Windsor small & 385 big-block)
Mercury       1974-1985 (Modified, Windsor small & 385 big-block)
Oldsmobile   1970-1991 (inline 6-cyl, SBC, Oldsmobile V8)
Plymouth     1975-1983 (inline 6-cylinder)
Pontiac        1970-1991 (most engines)