Champion 25-1 Spark Plug

Reliable Ignition Performance for Classic and Modern Vehicles

The Champion Copper Plus 25-1 spark plug delivers consistent ignition performance for a wide range of vehicles including Buick, Chevrolet, Ford, and Pontiac models. Designed with durable nickel electrodes and a tapered seat, this spark plug ensures efficient combustion and reliable starts.

• Ground electrode core made of nickel for durability
• Center electrode tip constructed from nickel
• Pre-gap size of 0.035 inches for optimal spark
• Removable nut electrical terminal type for easy connection
• Resistor type spark plug to reduce electrical interference
• Tapered seat type for secure fitment
• Thread diameter of 14 mm and reach of 0.441 inches
• Hex size of 0.625 inches (15.88 mm) for standard installation tools
• Manufacturer heat range 17 suitable for small engine applications

About the Champion Copper Plus Spark Plug Line

The Copper Plus line from Champion is engineered to provide dependable ignition with copper core technology. This line focuses on delivering consistent spark and heat dissipation, which helps maintain engine efficiency and performance. The 25-1 spark plug is part of this line, offering a balance of durability and conductivity ideal for small engine and automotive applications.

Technical Details and Compatibility

The Champion Copper Plus 25-1 spark plug features a single ground electrode made of nickel, paired with a nickel center electrode tip. The pre-gap is set at 0.035 inches (0.90 mm), ensuring proper spark gap for ignition. It includes a removable nut electrical terminal type and a resistor to minimize radio frequency interference. The tapered seat and 14 mm thread diameter with a 0.441-inch reach provide a secure and precise fit. This spark plug is compatible with a variety of vehicles such as the Chevrolet Camaro, Ford Mustang, Pontiac Firebird, Buick Century, and many others from Buick, Chevrolet, Chrysler, Dodge, Ford, GMC, Lincoln, Mercury, Oldsmobile, Plymouth, and Pontiac.

Common Applications and Problem Solving

• Restores reliable ignition in older Buick and Chevrolet models
• Improves engine start-up consistency in Ford and Pontiac vehicles
• Reduces misfires caused by worn or damaged spark plugs
• Helps maintain fuel efficiency by ensuring proper combustion
• Minimizes electrical interference in ignition systems with resistor design

Installation Notes and Tips

When installing the Champion Copper Plus 25-1 spark plug, ensure the pre-gap is maintained at 0.035 inches for optimal performance. Use a 0.625-inch (15.88 mm) hex socket for installation. The tapered seat requires proper torque to avoid leaks or damage—refer to the vehicle manufacturer’s specifications. The removable nut terminal allows for flexible connection options during installation.

Quality Assurance and Warranty

Champion spark plugs are manufactured to meet strict quality standards for durability and performance. The Copper Plus 25-1 spark plug includes a resistor to reduce electrical noise and is designed for consistent heat range management. While specific warranty details are not provided, Champion products typically adhere to industry standards for reliability and longevity.