Autolite 4054 Copper Non-Resistor Spark Plug

The Autolite 4054 is a copper non-resistor spark plug engineered to deliver reliable ignition, quick starts, and consistent combustion. Built with a full copper core center electrode for superior thermal conductivity, this plug helps maintain optimal engine temperature and resists fouling across a wide range of operating conditions.

Key Features:

• Copper Core Center Electrode: Provides higher thermal conductivity for better performance and improved resistance to fouling
• High Nickel Alloy Electrodes: Specially engineered center and ground electrodes deliver extended service life
• Copper-Glass Seal: Bonds the insulator and terminal post center electrode together, ensuring full required voltage at the spark gap with a 100% gas-tight, leak-proof seal
• High Alumina Multi-Rib Ceramic Insulator: Reduces the risk of flash-over to prevent misfires and provides superior thermal conductivity and insulation strength
• Cold-Formed Steel Shell: Features precision-rolled threads and a one-piece terminal post for added structural strength
• Non-Resistor Design: No resistor — suitable for applications where resistor-type plugs are not required
• Removable Nut Terminal: Accommodates both solid and snap-on connector types

Specifications:

• Thread Diameter: 14mm
• Thread Pitch: 1.25mm
• Reach: 19mm (3/4")
• Hex Size: 13/16" (21mm)
• Seat Type: Gasket
• Factory Pre-Set Gap: 0.031" (0.8mm)
• Center Electrode Material: Nickel (copper core)
• Ground Electrode Material: Nickel
• Heat Range: 4
• Resistor: No
• Torque Spec (Cast Iron Head): 26–29 lb-ft
• Torque Spec (Aluminum Head): 15–22 lb-ft
• Warranty: 2 Years / up to 30,000 miles

The Autolite 4054 copper spark plug is sold individually and is a trusted, cost-effective replacement for a wide range of domestic and import applications. Backed by Autolite's decades of ignition expertise, it meets OE form, fit, and function requirements.