Description

Champion Copper Plus Resistor Spark Plug

Part No: 434, RC9MC4

Condition: New

Champion Copper Plus spark plug, stock number 434, plug designation RC9MC4. Features a copper-core center electrode for heat control, a corrosion-resistant coated shell, and a built-in resistor to reduce electrical interference. Suitable for applications specifically calling for RC9MC4. Sold individually. 

New old stock in original packaging. Packaging shows shelf wear.

Fitment / application

RC9MC4 appears in Champion’s application catalog for selected vehicles, including 2012–2015 Audi A7 Quattro models with the 3.0L V6. This is an application example, not a universal fitment guarantee. 

Verify the exact year, engine, specified plug, and gap before ordering. Do not substitute a copper plug where the manufacturer requires platinum or iridium without confirming suitability. 

Specifications

• Brand: Champion
• Series: Copper Plus
• Stock number: 434
• Plug designation: RC9MC4
• Thread diameter: 14 mm
• Thread reach: 19.05 mm
• Hex size: 15.88 mm / 5⁄8 inch
• Seat: Flat, with crush washer
• Resistor: Yes
• Champion heat range: 9
• Ground electrodes: One
• Catalog pre-gap: 1.14 mm / 0.045 inch—verify the gap required by the engine before installation.