The Spark Plug 4265/4 Copper by AUTOLITE is a high-quality spark plug designed to deliver optimal performance for a wide range of vehicles. With a copper-glass seal that bonds the insulator, terminal post, and center electrode together, this spark plug ensures a full required voltage at the spark gap, creating a gas-tight seal that is 100% leak-proof. The multi-rib insulator reduces the danger of “flash-over,” while the one-piece terminal post adds strength to the overall construction.

Additionally, the resistor in the Spark Plug 4265/4 Copper reduces radio frequency interference (RFI) and electrode erosion, ensuring a smooth and consistent spark. The cold-formed steel shell with precision-rolled threads provides durability and easy installation. The full copper core electrode further enhances performance in all conditions, making this spark plug a reliable choice for any vehicle.

One of the key features of the Spark Plug 4265/4 Copper is its compatibility with a wide range of Harley Davidson models, including FLH Electra Glide, FLHR Road King, FLHS Electra Glide Sport, FLHT Electra Glide, FLST Softail, and many more. This versatility makes it a popular choice among motorcycle enthusiasts looking for a reliable spark plug that can withstand the demands of their ride.

In conclusion, the Spark Plug 4265/4 Copper by AUTOLITE is a top-of-the-line spark plug that offers superior performance, durability, and compatibility with a wide range of vehicles. Whether you’re cruising down the highway on your Harley Davidson or exploring off-road trails on your Kawasaki or Moto Guzzi, this spark plug is sure to deliver the spark you need for a smooth and reliable ride.

Features:

• Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)
• Multi-rib insulator reduces danger of “flash-over”
• One-piece terminal post adds strength
• Resistor reduces radio frequency interference (RFI) and electrode erosion
• Cold-formed steel shell precision rolled threads
• Full copper core electrode provides better performance in all conditions
• Verify all cross-reference listings before purchase