Champion 408 Spark Plug

Champion Copper Plus 408 Spark Plug

Champion Copper Plus 408 is a replacement spark plug built for dependable ignition performance and stable heat control. Its copper core electrode improves conductivity, while nickel-based electrode materials support consistent wear characteristics in everyday driving.

Compatible With a wide range of vehicles, including Chevrolet Impala, Malibu, Uplander, Monte Carlo, Cavalier, and S10 applications, as well as Ford Windstar, Ranger, Bronco II, and F-150 fitments. The Champion 408 spark plug is also listed for Buick, Pontiac, Saturn, Mazda, Mercedes-Benz, Mercury, and Oldsmobile models across multiple model years.

• Copper core electrode for improved conductivity and heat transfer
• Nickel center and ground electrode materials
• Pre-gapped at 0.045 in. / 1.13 mm
• Resistor design for ignition system noise control
• Tapered seat with RS14YC plug type configuration
• Non-removable nut terminal and 14 mm thread diameter
• Champion Copper Plus classification for OE-style service replacement

Product Details

This spark plug uses a copper core electrode to help move heat away from the firing tip and maintain conductivity under normal operating conditions. The nickel center electrode tip and nickel copper alloy ground electrode are selected for steady wear and reliable spark delivery. With a manufacturer heat range of 14, tapered seat design, and a pre-gap size of 0.045 in., Champion 408 is a practical service part for drivers maintaining ignition performance on vehicles such as Chevrolet Impala, Pontiac G6, and Ford Ranger applications.

This part cross-references Autolite 106 and DENSO Auto Parts 5022 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions related to aged ignition components
• Reduced throttle response from weak combustion events
• Maintenance intervals requiring spark plug replacement

Installation Notes and Tips

Verify the vehicle’s required plug type, seat style, and gap before installation. This plug is listed with a 0.045 in. pre-gap, but several fitments note different OE gap specifications, so confirm the engine application before use. Check thread diameter, reach, and hex size against the original plug to ensure proper fitment. For best results, install on a cool engine and follow the manufacturer’s torque specification for the vehicle.

Quality Assurance

Champion Copper Plus plugs are built around a copper-core design for dependable performance and controlled heat transfer in routine service use. Part number 408 is cataloged as an OE-style replacement for a broad range of applications, including 2006-2011 Chevrolet Impala, 2006-2010 Chevrolet Malibu, and 1997-2003 Ford Windstar fitments.