Champion 430 Spark Plug - Intake Side

Champion Copper Plus 430 Spark Plug

Champion Copper Plus 430 is a resistor spark plug built for dependable ignition performance and steady heat control. Its copper core electrode improves conductivity, while nickel-based electrode materials support consistent wear in everyday driving and OE-style tune-ups.

Key Features

• Copper core electrode for improved conductivity and heat management
• Nickel center electrode tip and nickel ground electrode core material
• Pre-gapped at 0.041 in. / 1.05 mm
• Resistor type plug for ignition system noise control
• Flat seat design with 14 mm thread diameter and 0.75 in. reach
• Champion Copper Plus classification for OE-style service applications
• Part number 430 for easy catalog matching

Product Details

The Champion Copper Plus line focuses on practical, dependable ignition service for a wide range of vehicles. Part number 430 uses a copper core to move heat efficiently and maintain stable spark delivery, while the nickel electrode construction supports good overall wear in standard service intervals. The flat seat, 0.625 in. hex size, and non-removable nut terminal make it a straightforward replacement for many import and domestic applications. This part cross-references Autolite 3923 and NGK 7556 for the same application.

Compatible With applications such as 2011-2020 Mitsubishi Outlander Sport, 2013-2017 Mitsubishi Lancer, and 2011-2017 Mitsubishi RVR, as well as select Audi, Mercedes-Benz, Volvo, Toyota, Saab, Chevrolet, and Nissan models listed in the fitment data. For vehicles like the 2005-2011 Mercedes-Benz SLK55 AMG, 2005-2006 Mercedes-Benz C55 AMG, and 2003-2006 Mercedes-Benz CLK55 AMG, the notes specify dual-plug cylinder requirements where applicable. The Champion 430 spark plug also appears in OE-type service listings for models such as the 2003-2005 Kia Rio, 2002-2005 Land Rover Freelander, and 2001-2003 Toyota Sienna.

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 degraded plug performance
• Heat-related plug wear in routine service use

Installation Notes and Tips

Verify the plug type RC9YC4 and confirm the required gap before installation, since listed applications vary by vehicle and engine configuration. The pre-gap is 0.041 in., while fitment notes include gaps such as 0.039 in., 0.040 in., 0.041 in., and 0.044 in. depending on the application. Check the vehicle service information for the correct torque specification and cylinder-specific requirements, especially on Mercedes-Benz applications that call for dual plugs per cylinder. Confirm thread diameter, reach, seat type, and hex size against the original plug before installation.

Quality Assurance

Champion designs Copper Plus spark plugs for dependable OE-style ignition service, using a copper core electrode and nickel electrode materials to balance conductivity, heat control, and wear characteristics. Part number 430 is built to match the listed plug type and fitment requirements shown above.