A platinum tipped ground electrode further contributes toward the extreme longevity of this plug. NGK traditional plugs are constructed for longer life and optimum performance. Corrugated ribs prevent flashover. NGK uses only the purest alumina silicate in its ceramic insulator which give all NGK plugs greater strength and better heat transfer. Copper cored and triple sealed to further aid in heat removal and prevent interior leakage. Solid terminal top cannot be removed. Some application require a solid top due to its greater durability than an aluminum terminal nut and will not unscrew under high vibration conditions.

D8HA ---->  Traditional Spark Plug, 12mm Thread Size, 12.7mm (1/2") Reach, 11/16" (18mm) Hex Size, Gasket Seat, Non-Resistor, Projected Tip, Stud Terminal Threads, .028" (0.7mm) Gap, Heat Range 6. NOTE: Does not Include Terminal Nut.

DR8ES-L ----> Traditional Spark Plug, 12mm Thread Size, 19mm (3/4") Reach, 11/16" (18mm) Hex Size, Gasket Seat, Resistor, Stud Terminal Threads, Half Heat Range, .028" (0.7mm) Gap, Heat Range 8.5. NOTE: Does not Include Terminal Nut.

BR9ES ----> Traditional Spark Plug, 14mm Thread Size, 19mm (3/4") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Resistor, Solid Terminal Nut, .031" (0.8mm) Gap, Heat Range 9.

BR8ES ----> Traditional Spark Plug, 14mm Thread Size, 19mm (3/4") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Resistor, Solid Terminal Nut, .031" (0.8mm) Gap, Heat Range 9.

BR7ES ----> Traditional Spark Plug, 14mm Thread Size, 19mm (3/4") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Resistor, Solid Terminal Nut, .031" (0.8mm) Gap, Heat Range 9.

BPR7ES ----> Traditional Spark Plug, 14mm Thread Size, 19mm (3/4") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Resistor, Solid Terminal Nut, JIS Height, Projected Tip, .028" (0.7mm) Gap, Heat Range 9.

DPR8EA-9 ----> Traditional Spark Plug, 12mm Thread Size, 19mm (3/4") Reach, 11/16" (18mm) Hex Size, Gasket Seat, Resistor, Stud Terminal Threads, Projected Tip, .035" (0.9mm) Gap, Heat Range 6. NOTE: Does not Include Terminal Nut.

DPR7EA-9 ----> Traditional Spark Plug, 12mm Thread Size, 19mm (3/4") Reach, 11/16" (18mm) Hex Size, Gasket Seat, Resistor, Stud Terminal Threads, Projected Tip, .035" (0.9mm) Gap, Heat Range 6. NOTE: Does not Include Terminal Nut.

DPR8Z ----> Traditional Spark Plug, 12mm Thread Size, 19mm (3/4") Reach, 11/16" (18mm) Hex Size, Gasket Seat, Resistor, Extended Metal Shell, Stud Terminal Threads, Extended Projected Tip, Oversized (2.9mm) Center Eelectrode, .028" (0.7mm) Gap, Heat Range 8. NOTE: Does not Include Terminal Nut. 

BKR5E-11 ----> V-Power Plug, 14mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Solid Terminal Nut, ISO Length, Projected Tip, V-Power (V-Grooved Center Electrode), .043" (1.1mm) Gap, Heat Range 5

NGK's unique V-Power design directs the spark to the edge of the electrode where it develops more rapidly, this increases ignitability even in lean burn conditions. In addition the NGK V-Power plug has all the features of their traditional plugs including corrugated ribs, pure alumina silicate ceramic insulator for greater strength and better heat transfer, copper core and triple interior seal.

IFR8H-11 ----> Extreme Long Life Laser Iridium Plug, 14mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Solid Terminal Nut, Projected Tip, Iridium Tipped Fine Wire Center Electrode with Platinum Tipped Tapered Cut Ground Electrode, .043" (1.1mm) Gap, Heat Range 8.

ZFR7F-11 ----> V-Power Plug, 14mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Extended Projected Tip, Solid Terminal Nut, ISO Length, V-Power (V-Grooved Centere Electrode), .043" (1.1mm) Gap, Heat Range 7.

NGK's unique V-Power design directs the spark to the edge of the electrode where it develops more rapidly, this increases ignitability even in lean burn conditions. In addition the NGK V-Power plug has all the features of their traditional plugs including corrugated ribs, pure alumina silicate ceramic insulator for greater strength and better heat transfer, copper core and triple interior seal.

IFR6L-11 ----> Extreme Long Life Laser Iridium Plug, 14mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Projected Tip, Solid Terminal Nut, Iridium Tipped Fine Wire Center Electrode with Platinum Tipped Tapered Cut Ground Electrode, .043" (1.1mm) Gap, Heat Range 6