Champion 308 Spark Plug

Reliable Ignition with Champion Copper Plus Spark Plug 308

The Champion Copper Plus Spark Plug 308 is engineered to deliver consistent ignition performance for a range of vehicles including BMW 325i, Toyota Celica, and Dodge Intrepid. Designed with durable nickel electrodes and a precise pre-gap, this spark plug supports efficient combustion and engine reliability.

• Ground electrode core made of nickel for durability
• Non-removable nut electrical terminal type
• Nickel center electrode tip for stable spark
• Pre-gap size of 0.044 inches (1.12 mm) for optimal ignition
• Single ground electrode design
• Flat seat type ensuring proper fit and seal
• Heat range rating of 12 for controlled temperature management
• Resistor type spark plug to reduce electrical noise
• Thread diameter of 14 mm with 0.75 inch reach
• Hex size of 20.65 mm for standard installation tools

About the Champion Copper Plus Product Line

The Copper Plus line from Champion focuses on spark plugs that utilize a copper core to enhance conductivity and heat dissipation. This design helps maintain stable engine performance and reduces fouling. The Copper Plus 308 spark plug combines these benefits with nickel electrodes to provide a balance of durability and efficient ignition suitable for various passenger vehicles.

Technical Details and Compatibility

The Champion Copper Plus 308 spark plug features a nickel ground electrode core and center electrode tip, which contribute to reliable spark generation and resistance to wear. The pre-gap is factory set at 0.044 inches (1.12 mm), ensuring optimal spark gap for combustion efficiency. With a heat range of 12, this plug is designed to operate within a controlled temperature range to prevent overheating or fouling. The flat seat and 14 mm thread diameter with 0.75 inch reach make it compatible with specific engine designs.

Compatible Vehicles and Applications

• BMW models: 325i, 325is, 325iX, 528e, 535i, 635CSi
• Chrysler models: Concorde, Intrepid
• Dodge model: Intrepid
• Mitsubishi models: Mirage, Starlet
• Toyota models: Celica, Cressida, Tercel, Van

Common Issues Addressed by Champion Copper Plus 308

• Engine misfires due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Hard starting or rough idling conditions
• Electrical interference affecting engine sensors
• Premature spark plug wear in high-heat environments

Installation Notes and Tips

Ensure the spark plug gap is checked before installation, although the pre-gap is factory set at 0.044 inches (1.12 mm). Use a 20.65 mm (13/16 inch) socket wrench for proper tightening. Avoid over-torquing to prevent damage to the flat seat and threads. This spark plug features a non-removable nut electrical terminal, so compatible ignition wires or boots should be used. Follow vehicle manufacturer torque specifications for best results.

Quality Assurance and Warranty

Champion Copper Plus spark plugs are manufactured to meet OEM specifications for fit and function. The use of a copper core and nickel electrodes ensures consistent performance and durability. While specific warranty details may vary, Champion products typically come with a limited warranty against manufacturing defects. Refer to Champion’s official documentation for complete warranty information.