TheseChampion made unitsare theperfectplugsfor your hot rod or original. The improved Copper Plus element offers better fuel burn and quicker starts. Go with the best. Not for use in 60HP engines.

• Superior performance and long lasting durability no other Plug comes close.
• Increased fuel burn and quicker starts with Champions Copper Plus element.

Specifications:
Thread Size: .709 inch (18mm)
Hex Size: .875 inch