Champion 809 Spark Plug

Champion Copper Plus 809 Spark Plug

Champion Copper Plus 809 is a replacement spark plug built for steady ignition performance and dependable wear. Its copper core electrode improves conductivity and heat control, while the nickel center and ground electrode materials support consistent firing in demanding secondary ignition systems.

Key Features

• Copper core electrode for improved conductivity and heat management
• Nickel center electrode tip and nickel ground electrode core material
• Resistor design for reduced electrical noise
• Flat seat with 0.75-inch reach and 12 mm thread diameter
• Pre-gapped at 0.025 inch / 0.65 mm
• Removable nut terminal for common ignition wire connections
• Champion Copper Plus small engine classification

Product Details

The Champion Copper Plus line focuses on practical ignition performance with a copper core design that helps maintain stable spark delivery and heat control. Part number 809 uses a single ground electrode, a 6 heat range, and a resistor configuration to support reliable operation in OE-style applications. This spark plug is listed with RA6HC plug type dimensions and is used in select performance and European applications, including BMW M3, BMW M5, BMW M6, Ferrari Testarossa, Ferrari Mondial 3.2, and Lamborghini Murcielago fitments.

This part cross-references Bosch X5DC for the same application.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire conditions related to weak ignition output
• Rough idle from degraded plug electrodes
• Loss of throttle response from poor spark delivery
• Heat-related plug wear in demanding engine conditions

Installation Notes and Tips

Verify the plug type, thread diameter, reach, seat style, and terminal style before installation. Champion 809 is pre-gapped to 0.025 inch, but the vehicle application may call for a different gap specification; confirm the required gap for your BMW M3, BMW M5, Ferrari Testarossa, or other listed application before use. Inspect the ignition wire or coil connection and tighten to the manufacturer’s specification to avoid thread or seat damage.

Quality Assurance

Champion is a long-established ignition brand, and the Copper Plus design uses proven copper-core construction with nickel electrode materials for consistent service in OE-style applications. Part number 809 is built to match the listed RA6HC-style fitments and dimensional requirements.