Champion 304 Spark Plug

Reliable Ignition Performance for Select Vehicles

The Champion Copper Plus 304 spark plug is engineered to deliver consistent ignition performance for a range of vehicles including Ford F-150, Chevrolet Camaro, and Audi A8 Quattro. Designed with durable nickel and copper alloy materials, this spark plug supports efficient combustion and reliable engine starts.

• Ground electrode core and center electrode tip made of nickel for durability
• Pre-set gap size of 0.035 inches (0.89 mm) for optimal spark
• Single ground electrode constructed from nickel copper alloy
• Resistor type spark plug to reduce electrical interference
• Tapered seat type with a thread diameter of 14 mm and reach of 0.689 inches
• Hex size of 0.625 inches (15.88 mm) for easy installation
• Manufacturer heat range rating of 9 for balanced heat dissipation
• Electrical terminal type features a removable nut for secure connection

About the Champion Copper Plus Product Line

The Copper Plus line from Champion focuses on spark plugs that combine copper core technology with nickel alloy electrodes to provide reliable ignition and consistent performance. The Copper Plus 304 spark plug benefits from this design by offering enhanced conductivity and durability, making it suitable for a variety of vehicles such as Cadillac CTS, Jaguar S-Type, and Lincoln Town Car.

Technical Details and Specifications

This spark plug features a center electrode diameter of 0.1 inches and an insulator height of 0.06 inches, ensuring precise spark delivery. The tapered seat type and thread diameter of 14 mm (0.551 inches) provide a secure fit in compatible engines. The pre-gap size is factory set at 0.035 inches (0.89 mm), which supports optimal ignition timing and combustion efficiency. The resistor design helps minimize radio frequency interference, protecting vehicle electronics.

Compatible Vehicles and Applications

• Ford F-150, F-250, F-350 Super Duty models
• Chevrolet Camaro and Corvette
• Audi A8 Quattro and V8 Quattro
• Jaguar S-Type, X-Type, and XJ12
• Lincoln Town Car and Navigator
• Cadillac CTS and STS
• Other makes including Aston Martin DB7, DB9, and V12 Vantage

Common Issues Addressed by Champion Copper Plus 304

• Engine misfires due to worn or faulty spark plugs
• Difficulty starting the engine in cold or damp conditions
• Reduced fuel efficiency from incomplete combustion
• Rough idling or hesitation during acceleration
• Electrical interference affecting onboard electronics

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.035 inches (0.89 mm) as specified. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the tapered seat. The removable nut electrical terminal allows for easy connection to ignition wires. Always replace spark plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

Champion Copper Plus spark plugs are manufactured to meet OEM specifications and undergo rigorous quality control. The part number 304 ensures compatibility with specified vehicle makes and models. While specific warranty details vary by distributor, Champion products typically include coverage against manufacturing defects.