4 DENSO Spark Plugs PK16PR-P11 Double Platinum # 3174
4 DENSO Spark Plugs PK16PR-P11 Double Platinum # 3174, 14mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Solid Terminal Nut, Double Thick Platinum-tipped Ground Electrode and Platinum-tipped Center Electrode, Projected Tip, .043" (1.1mm) Gap, Heat Range 16