Spark Plugs. Fits Big Twin 1948-1975.

Product Details







Autolite® Copper spark plugs are engineered to deliver quick starts and the power your vehicle or applications needs to meet performance expectations.*Sold Each*Autolite Number: 4275*The copper core center electrode aids in thermal control and improves resistance to fouling.*Its specially engineered high nickel alloy center and ground electrode provides extended life.*The high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength.*Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
MFR PART No: 4275

ROLLIES PART No: AL-4275