Champion 406 Spark Plug

Champion Copper Plus 406 Spark Plug

Champion Copper Plus 406 is a replacement spark plug built for dependable ignition performance in a wide range of older GM, Ford, Jeep, and related applications. Its copper core electrode helps improve conductivity and heat control, while the nickel center and ground electrode materials support consistent wear characteristics for everyday driving.

For drivers searching for a Champion 406 spark plug for Chevrolet P30, Ford F-150, or GMC K1500 fitment, this plug matches many OE-style RV12YC applications. The tapered seat, resistor design, and 0.040 pre-gap make it a practical choice for maintenance on classic trucks, vans, SUVs, and passenger cars.

Key Features

• Copper core electrode for improved conductivity and heat management
• Nickel center electrode tip and nickel ground electrode core material
• Resistor type spark plug for ignition system noise control
• Pre-gapped at 0.040 in. for straightforward service setup
• Tapered seat design with 14 mm thread diameter
• Champion Copper Plus line for OE-style replacement applications

Product Details

The Champion Copper Plus line focuses on dependable secondary ignition performance with a copper core design that helps transfer heat efficiently from the firing end. Part number 406 is listed as plug type RV12YC and cross-references Champion Spark Plug 14 for the same application. It is commonly selected for vehicles such as Chevrolet P30, GMC P3500, and Ford F-250 HD applications where the correct heat range and thread specifications matter.

Fitment coverage spans many 1970-1997 vehicles, including Chevrolet Camaro, Ford Mustang, and GMC Yukon applications. The plug’s 0.441 reach, 15.875 mm hex size, and non-removable nut terminal support OE-style service replacement needs across a broad range of engines.

Common Issues This Part Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark delivery
• Misfire concerns related to aged secondary ignition components
• Reduced throttle response from degraded plug performance
• Maintenance needs on OE-style RV12YC spark plug applications

Installation Notes and Tips

Verify the required plug type, heat range, and seat style before installation. Confirm the specified gap for your vehicle application, since listed fitment notes vary by model and engine package. Use the vehicle service manual for torque and gap verification, and inspect ignition wires, distributor components, and coil condition during service.

Compatible With many Chevrolet P30, GMC K1500, and Ford F-150 applications across the 1970-1997 model years. Always match the plug specification to the exact engine configuration and OE callout.

Quality Assurance

Champion Copper Plus plugs are built around a copper core electrode and nickel-based firing-end materials to support consistent service life in everyday use. Part number 406 is engineered to meet the dimensional and application requirements listed for RV12YC-style fitments.