Autolite Spark Plug (MPN: 646)

High-Quality Ignition Solution for Optimal Engine Performance

The Autolite Spark Plug 646 is engineered to provide reliable ignition and enhanced performance for a variety of vehicles. With over a century of experience in the automotive industry, Autolite delivers products that meet or exceed original equipment specifications, ensuring efficient engine operation and longevity.

Features

• Copper-Glass Seal bonds the insulator and terminal post center electrode, ensuring full voltage at the spark gap with a gas-tight seal that is 100 percent leak-proof.
• Multi-rib insulator design minimizes the risk of "flash-over," enhancing safety and reliability.
• One-piece terminal post construction adds strength and durability.
• Cold-formed steel shell with precision rolled threads for a secure fit.
• Full copper core electrode enhances performance across all driving conditions.
• Designed to deliver quick starts, improved fuel economy, and smooth acceleration.
• Resistor technology reduces radio frequency interference (RFI) and minimizes electrode erosion.

Specifications

• Manufacturer: Autolite Spark Plugs
• Manufacturer Part Number: 646
• Resistor: Yes
• Electrode Type: OEM
• Electrode Core Material: Copper
• Electrode Tip Material: Nickel Alloy
• Insulator Type: Projected
• Thread Size (IN): 0.551 Inch
• Quantity: Single
• Reach: 3/4 Inch
• Seat Type: Gasket
• Wrench Diameter: 13/16 Inch