Autolite 605 Spark Plug

Autolite Copper Resistor Spark Plug 605

Autolite Copper Resistor Spark Plug 605 is an OE-style replacement spark plug built for quick starts, steady idle quality, and smooth acceleration. It uses a copper center electrode, nickel tip materials, and a resistor design to support reliable ignition performance across a wide range of domestic and import applications.

The Autolite Copper Spark Plug line focuses on OE form, fit, and function at a value-oriented price point. For drivers servicing Chevrolet Silverado 1500, GMC Sierra 1500, and other listed applications, part number 605 provides a direct replacement option with the dimensions and heat-range style commonly specified for these engines.

Key Features

• Copper center electrode for consistent spark delivery
• Resistor design with 4000 ohms resistance
• Nickel center and ground electrode tip materials
• Tapered ground electrode tip design and tapered seat type
• Pre-gapped at 0.060 in. / 1.50 mm
• Ceramic insulator with mid-projection insulator type
• 14 mm thread diameter, 17.0 mm reach, 5/8 in. hex size
• OE-style replacement for many foreign and domestic vehicles

Detailed Description

Autolite 605 is a copper resistor spark plug engineered to match common OE specifications for ignition service. The standard/regular center electrode design, stud terminal type, and tapered seat help it align with factory-style ignition systems that call for a 0.060-inch gap or closely related OE gap settings. This makes it a practical choice for routine tune-ups on vehicles such as Chevrolet Express, GMC Savana, Ford Mustang, and select Cadillac, Pontiac, and Oldsmobile models.

This part cross-references Champion Spark Plug 13 for the same application. It also cross-references DENSO Auto Parts 5023 for the same application.

What It Helps Address

• Hard starting caused by worn spark plugs
• Rough idle from weak or inconsistent spark
• Reduced throttle response during acceleration
• Misfire conditions related to plug wear or gap drift
• Maintenance intervals requiring OE-style spark plug replacement

Installation Notes and Tips

Verify the required spark plug gap for your engine before installation. This plug is pre-gapped at 0.060 in. / 1.50 mm, but several listed vehicles use different OE gap specifications, including 0.050 in. and 0.054 in. applications. Confirm thread diameter, reach, seat type, and terminal style against the vehicle service information before installing Autolite 605.

Compatible fitment examples include Fits 1999-2009 Chevrolet Silverado 1500, Fits 1999-2009 GMC Sierra 1500, and Fits 1998-2004 Ford Mustang. Additional listed applications include Fits 1996-2009 Chevrolet Express 1500 and Fits 1996-2009 GMC Savana 1500.

Quality Assurance

Autolite supplies ignition products for the automotive aftermarket and original equipment channels, with a focus on OE-style fit and function across a broad vehicle range. Part number 605 is built to the listed specifications for dependable replacement service.