Pack of 4 Genuine NGK 7913 Iridium Spark Plugs SILFR6A

Shell
Thread Diameter: 14mm
Thread Pitch: 1.25mm
Seat Type: Gasket
Reach: 26.5mm (1.04")
Hex Size: 5/8" (16mm)
Terminal Type: Solid
Overall Height: ISO
Gap: .031" (0.8mm)

Center Electrode
Material: Iridium
Type: Fine Wire
Size: 0.6mm
Projection: Projected

Ground Electrode
Material: Platinum
Type: Square
Shape: Taper Cut

Specifications
Resistor: Yes
Resistor Value: 5k Ohm
Heat Range: 6
Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.

Part Information
Brand: NGK/NTK
Warranty: 60 Days
Longevity: 100k Miles