These spark plugs have a 5-rib insulator design to avoid flashover and corrosion-resistant plating for installation and removal convenience. Cold-rolled threads protect cylinder heads from damage. The triple gasket sealing method essentially prevents gas from leaking outside the shell. Solid Copper Core offers improved heat dissipation, conductivity, and a wider operating temperature range. These OE-recommended standard spark plugs are dependable. Key Features: Constructed for enhanced durability and performance Trivalent metal plating offers exceptional anti-corrosion and anti-seizing qualities Ribs that are corrugated avoid flashover. Pure alumina silicate ceramic insulation provides excellent strength and improved heat transfer. Copper core facilitates heat transfer. Triple sealing prevents water infiltration. Specifications: Brand: Autowares SKU: 86-3323 Weight: 0.15 LBS Manufacturer Part Number (MPN): 3323 Thread Diameter: 18mm Thread Pitch: 1.5mm Seat Type: Tapered Reach: 11mm (7/16") Hex Size: 13/16" (21mm) Terminal Type: Solid Overall Height: ISO Gap: .035" (0.9mm) Center Electrode Material: Nickel Type: Standard Size: 2.5mm Projection: Non-Projected Resistor: Yes Resistor Value: 5k Ohm Heat Range: 6 Longevity: 30k Miles