Champion racing plugs are engineered to help engine builders, weekend racers and street performance enthusiasts optimize engine performance. Enjoy the same spark plugs that go into many professional race cars and trucks.

• Type: S57C
• Hex Size: 0.625"
• Thread Size: 0.551"
• Gap: 0.023"-0.028"
• Material: Nickel Copper Alloy
• Seat Type: Tapered
• Heat Range: 57
• 1/Pkg.