Champion 38 Spark Plug

Champion Copper Plus 38 Spark Plug

Champion Copper Plus 38 is a non-resistor spark plug built for dependable ignition performance in classic and older applications. Its copper core electrode improves conductivity and heat control, while the nickel center and ground electrode materials support consistent wear characteristics.

Key Features

• Copper core electrode for improved conductivity and heat management
• Nickel center electrode tip and nickel ground electrode core material
• Non-resistor design for applications that require a resistor-free plug
• Pre-gapped at 0.032 in. for the listed specification
• Flat seat, 14 mm thread diameter, 0.75 in. reach, and 0.813 in. hex size
• Champion Copper Plus classification for OE-style service in select vintage vehicles

Product Details

This Champion spark plug, part number 38, is part of the Copper Plus line, which focuses on straightforward ignition service with a copper core for stable electrical transfer and heat control. The plug type is N12YC, with a non-removable nut terminal and no resistor, making it a direct match for many older BMW, Jaguar, Toyota, Dodge, Chevrolet, Pontiac, and Chrysler applications that specify this configuration. This part cross-references Monroe Shocks & Struts (e.g., 5811) for the same application.

Compatible fitment includes 1987-1992 BMW 735i, 1988-1992 BMW 735iL, 1989-1990 BMW 525i, 1978-1987 Jaguar XJ6, 1968-1979 Toyota Corolla, and 1968-1972 Dodge Charger. The Champion 38 spark plug also appears in OE-style service applications for classic Chevrolet Bel Air, Impala, Camaro, Corvette, and Pontiac Firebird models where the N12YC specification is called for.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire concerns from degraded electrode surfaces
• Weak ignition performance in non-resistor applications
• Heat-related plug wear in older engine designs
• Service intervals that require a direct OE-style replacement plug

Installation Notes and Tips

• Verify the required plug type, reach, seat style, and resistor specification before installation.
• Confirm the gap against the vehicle service specification; listed pre-gap is 0.032 in., while some fitments note different OE gaps.
• Use the correct torque procedure for the cylinder head material and thread condition.
• Inspect ignition wires, distributor components, and coil output during plug service to avoid repeat misfire issues.

Quality Assurance

Champion Copper Plus plugs are built around a copper core design for conductivity and heat control, with nickel electrode materials selected for dependable wear in service. Part number 38 is engineered to match the listed N12YC-style applications and OE-type requirements shown in the fitment data.