Champion 977 Spark Plug

Champion Copper Plus 977 Spark Plug

Champion Copper Plus 977 is a copper-core spark plug built for dependable ignition performance and steady heat control. It is a direct-fit style plug for select Ferrari and Maserati applications, including the Ferrari F355, Ferrari F50, Ferrari F40, and Maserati 3200 GT.

Key Features

• Copper core electrode for improved conductivity and heat transfer
• Nickel center electrode tip and nickel ground electrode materials
• Resistor design for ignition system noise control
• Flat seat construction with a 0.75 in reach
• Pre-gapped at 0.030 in for straightforward service setup
• Champion Copper Plus small engine classification
• Part number 977 for easy identification and ordering

Product Details

The Champion Copper Plus line focuses on consistent spark delivery and controlled operating temperatures through a copper core electrode. This helps support stable combustion and normal wear characteristics in demanding ignition systems. Part number 977 uses a 10 mm thread diameter, 15.88 mm hex size, non-removable nut terminal, and a resistor configuration, making it a practical replacement spark plug for performance-oriented European vehicles that specify the RG6YC plug type. This part cross-references Bosch 7411 for the same application.

Vehicle Fitment

• Fits 1999-2003 Maserati 3200 GT, N/A; Gap 0.028 (in); Plug Type Number RG6YC; Copper Plus
• Fits 1999 Ferrari F355, N/A; Gap 0.028 (in); Plug Type Number RG6YC; Copper Plus
• Fits 1999 Ferrari F355 Spider, N/A; Gap 0.028 (in); Plug Type Number RG6YC; Copper Plus
• Fits 1998 Ferrari F355 F1, N/A; Gap 0.028 (in); Plug Type Number RG6YC; Copper Plus
• Fits 1994-1998 Ferrari F355 GTS, N/A; Gap 0.028 (in); Plug Type Number RG6YC; Copper Plus
• Fits 1996-1998 Ferrari F355 Spider, N/A; Gap 0.035 inches; Plug Type Number RG6YC; Copper Plus
• Fits 1996-1997 Ferrari F50, N/A; Gap 0.020 (in); Plug Type Number RG6YC; Copper Plus
• Fits 1995 Ferrari F50, N/A; Gap 0.035 inches; Plug Type Number RG6YC; Copper Plus
• Fits 1990-1992 Ferrari F40, N/A; Gap 0.036 (in); Plug Type Number RG6YC; Copper Plus

Installation Notes

Verify the required plug type, gap specification, and seat style before installation. This plug is pre-gapped at 0.030 in, but the vehicle-specific gap listed in the fitment notes should be confirmed for the exact application. Check thread diameter, reach, and hex size against the original plug to ensure proper fitment in Ferrari F355, Ferrari F50, Ferrari F40, and Maserati 3200 GT engines.

Quality Assurance

Champion Copper Plus spark plugs are built around a copper-core design for conductivity and heat control, with nickel electrode materials for dependable service life. The 977 part number is identified as Champion Copper Plus Small Engine classification and is engineered to meet the plug type and heat range requirements listed for the confirmed applications.