Description
The Champion Copper Plus Spark Plug 415 is built for dependable ignition performance across a wide range of automotive, marine, and industrial applications. Featuring a copper core center electrode, this spark plug delivers increased conductivity and accurate heat control to support reliable starts, consistent combustion, and good overall wear.
As part of the Champion Copper Plus line, the RN9YC is designed for long-lasting replacement performance with superior corrosion resistance and construction that meets ISO and SAE standards. Its resistor design helps maintain stable ignition operation, while the flat seat and crush washer configuration support proper installation in compatible engines.
With a 0.032 in (0.82 mm) pre-gap, 14 mm thread diameter, and 0.75 in reach, this spark plug is a solid OEM-style replacement for a wide variety of European, import, classic, performance, and marine applications.
Features
-
Copper core center electrode for improved conductivity and heat control
-
Champion Copper Plus design for dependable performance and durability
-
Superior corrosion resistance for long service life
-
Built to ISO and SAE standards for proven performance
-
Resistor design for consistent ignition reliability
-
Standard replacement spark plug for automotive, marine, and industrial applications
Specifications
-
Brand: Champion
-
Part Number: 415
-
Plug Type: RN9YC
-
Classification: Champion Copper Plus
-
Grade Type: Standard Replacement
-
Part Description: Spark Plug
Electrode Specifications
-
Center Electrode Tip Material: Copper
-
Center Electrode Design: Standard
-
Center Electrode Diameter: 0.1 in
-
Ground Electrode Quantity: 1
-
Ground Electrode Core Material: Nickel
-
Ground Electrode Tip Material: Nickel
-
Ground Electrode Material: Nickel Copper Alloy
Dimensions
-
Thread Diameter: 14.000 mm / 0.551 in
-
Reach: 0.75 in
-
Seat Type: Flat
-
Hex Size: 0.813 in / 20.650 mm
-
Insulator Height: 0.06 in
-
Installed Height: 2.24 in
-
Insulator Projection: 0.06 in
-
Taper Diameter: 0.25 in
Performance
Additional Details
Fitment
The Champion 415 spark plug fits a wide range of applications, including select:
-
Alfa Romeo, Aston Martin, Audi, Austin, BMW, Chevrolet, Dodge, Eagle, Fiat, Ford, GMC, Honda, Hyundai, Jaguar, Land Rover, Lotus, Maserati, Mazda, Mercedes-Benz, Mitsubishi, Nissan, Peugeot, Plymouth, Pontiac, Porsche, Renault, Saab, Subaru, Toyota, Triumph, Volkswagen, Volvo, and Yugo models
-
Marine applications from Mercruiser, Volvo Penta, Gray Marine, Westerbeke, and OMC
-
Additional industrial and engine applications listed in the original fitment data
This plug is commonly used in select European classics, import passenger vehicles, performance engines, marine engines, and industrial equipment. For exact compatibility, confirm fitment by year, make, model, engine size, and engine code using the full application list provided.
