NGK racing-tändstift R5671A-9.

Shell

Thread Size: 14mm
Thread Pitch: 1.25mm
Seat Type: Gasket
Reach: 19mm (3/4")
Hex Size: 5/8" (16mm)
Terminal Type: Solid
Overall Height: ISO
Gap: .031" (0.8mm)
Center Electrode

Material: Nickel
Type: V-Cut
Size: 2.5mm
Projection: Non-Projected
Ground Electrode

Material: Nickel
Type: Standard
Specifications

Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.
Heat Range: 9
Longevity: 30k Miles
Resistor: No