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Copper Plus™ Spark Plug delivers controlled heat management and extended service life with a copper-core center electrode. ✨
Patented SAC-9 semiconductor resistor provides maximum suppression of EMI and RFI to protect vehicle electronics and ensure stable ignition.
Ultraseal™ coated shell prevents rust for long-term reliability, and the plug is made in the USA to consistent quality standards.
: J12YC
In Stock
Data sheet
- Type
- Non-Resistor
- Units
- Each
- Style
- Copper Plus
- Brand
- CHAMPION
- Thread Size
- 14 mm
- Center Electrode Type
- Standard
- Electrode Tip Material
- Nickel Alloy
- Ground Electrode Shape
- Standard
- Ground Electrode Configuration
- Single
- Heat Range
- 12
- Terminal Configuration
- Solid Terminal
- Center Electrode Projection
- Projected
- Hex Size
- 20.6 mm (13/16")
- Thread Reach
- 9,5 mm (3/8")
This product fits the following vehicles. Use the filters below to narrow down the list if needed.
| Manufacturer | Model | Family | Year | Notes |
|---|---|---|---|---|
| Harley Davidson | Big Twin | 1948 | ||
| Harley Davidson | Hydra Glide | Big Twin | 1949 | |
| Harley Davidson | Hydra Glide | Big Twin | 1950 | |
| Harley Davidson | Hydra Glide | Big Twin | 1951 | |
| Harley Davidson | Hydra Glide | Big Twin | 1952 | |
| Harley Davidson | Big Twin | 1948 | ||
| Harley Davidson | Hydra Glide | Big Twin | 1949 | |
| Harley Davidson | Hydra Glide | Big Twin | 1950 | |
| Harley Davidson | Hydra Glide | Big Twin | 1951 | |
| Harley Davidson | Hydra Glide | Big Twin | 1952 | |
| Harley Davidson | Big Twin | 1948 | ||
| Harley Davidson | Hydra Glide | Big Twin | 1949 | |
| Harley Davidson | Hydra Glide | Big Twin | 1950 | |
| Harley Davidson | Hydra Glide | Big Twin | 1951 | |
| Harley Davidson | Hydra Glide | Big Twin | 1952 | |
| Harley Davidson | Big Twin | 1948 | ||
| Harley Davidson | Hydra Glide | Big Twin | 1949 | |
| Harley Davidson | Hydra Glide | Big Twin | 1950 | |
| Harley Davidson | Hydra Glide | Big Twin | 1951 | |
| Harley Davidson | Hydra Glide | Big Twin | 1952 | |
| Harley Davidson | Hydra Glide | Big Twin | 1953 | |
| Harley Davidson | Hydra Glide | Big Twin | 1954 | |
| Harley Davidson | Hydra Glide | Big Twin | 1955 | |
| Harley Davidson | Hydra Glide | Big Twin | 1956 | |
| Harley Davidson | Hydra Glide | Big Twin | 1957 | |
| Harley Davidson | Duo Glide | Big Twin | 1958 | |
| Harley Davidson | Duo Glide | Big Twin | 1959 | |
| Harley Davidson | Duo Glide | Big Twin | 1960 | |
| Harley Davidson | Duo Glide | Big Twin | 1961 | |
| Harley Davidson | Duo Glide | Big Twin | 1962 | |
| Harley Davidson | Duo Glide | Big Twin | 1963 | |
| Harley Davidson | Duo Glide | Big Twin | 1964 | |
| Harley Davidson | Electra Glide | Big Twin | 1970 | |
| Harley Davidson | Electra Glide | Big Twin | 1971 | |
| Harley Davidson | Electra Glide | Big Twin | 1972 | |
| Harley Davidson | Electra Glide | Big Twin | 1973 | |
| Harley Davidson | Electra Glide | Big Twin | 1974 | |
| Harley Davidson | Electra Glide | Big Twin | 1965 | |
| Harley Davidson | Electra Glide | Big Twin | 1966 | |
| Harley Davidson | Electra Glide | Big Twin | 1967 | |
| Harley Davidson | Electra Glide | Big Twin | 1968 | |
| Harley Davidson | Electra Glide | Big Twin | 1969 | |
| Harley Davidson | Hydra Glide | Big Twin | 1953 | |
| Harley Davidson | Hydra Glide | Big Twin | 1954 | |
| Harley Davidson | Hydra Glide | Big Twin | 1955 | |
| Harley Davidson | Hydra Glide | Big Twin | 1956 | |
| Harley Davidson | Hydra Glide | Big Twin | 1953 | |
| Harley Davidson | Hydra Glide | Big Twin | 1954 | |
| Harley Davidson | Hydra Glide | Big Twin | 1955 | |
| Harley Davidson | Hydra Glide | Big Twin | 1956 | |
| Harley Davidson | Hydra Glide | Big Twin | 1952 | |
| Harley Davidson | Hydra Glide | Big Twin | 1953 | |
| Harley Davidson | Hydra Glide | Big Twin | 1954 | |
| Harley Davidson | Hydra Glide | Big Twin | 1955 | |
| Harley Davidson | Hydra Glide | Big Twin | 1956 | |
| Harley Davidson | Hydra Glide | Big Twin | 1957 | |
| Harley Davidson | Duo Glide | Big Twin | 1958 | |
| Harley Davidson | Duo Glide | Big Twin | 1959 | |
| Harley Davidson | Duo Glide | Big Twin | 1960 | |
| Harley Davidson | Duo Glide | Big Twin | 1961 | |
| Harley Davidson | Duo Glide | Big Twin | 1962 | |
| Harley Davidson | Duo Glide | Big Twin | 1963 | |
| Harley Davidson | Duo Glide | Big Twin | 1964 | |
| Harley Davidson | Electra Glide | Big Twin | 1965 | |
| Harley Davidson | Electra Glide | Big Twin | 1966 | |
| Harley Davidson | Electra Glide | Big Twin | 1967 | |
| Harley Davidson | Electra Glide | Big Twin | 1968 | |
| Harley Davidson | Electra Glide | Big Twin | 1969 | |
| Harley Davidson | Hydra Glide | Big Twin | 1955 | |
| Harley Davidson | Hydra Glide | Big Twin | 1956 | |
| Harley Davidson | Hydra Glide | Big Twin | 1957 | |
| Harley Davidson | Duo Glide | Big Twin | 1958 | |
| Harley Davidson | Duo Glide | Big Twin | 1959 | |
| Harley Davidson | Duo Glide | Big Twin | 1960 | |
| Harley Davidson | Duo Glide | Big Twin | 1961 | |
| Harley Davidson | Duo Glide | Big Twin | 1962 | |
| Harley Davidson | Duo Glide | Big Twin | 1963 | |
| Harley Davidson | Duo Glide | Big Twin | 1964 | |
| Harley Davidson | Electra Glide | Big Twin | 1970 | |
| Harley Davidson | Electra Glide | Big Twin | 1971 | |
| Harley Davidson | Electra Glide | Big Twin | 1972 | |
| Harley Davidson | Electra Glide | Big Twin | 1973 | |
| Harley Davidson | Electra Glide | Big Twin | 1974 | |
| Harley Davidson | Electra Glide | Big Twin | 1965 | |
| Harley Davidson | Electra Glide | Big Twin | 1966 | |
| Harley Davidson | Electra Glide | Big Twin | 1967 | |
| Harley Davidson | Electra Glide | Big Twin | 1968 | |
| Harley Davidson | Electra Glide | Big Twin | 1969 | |
| Harley Davidson | Hydra Glide | Big Twin | 1955 | |
| Harley Davidson | Hydra Glide | Big Twin | 1956 | |
| Harley Davidson | Hydra Glide | Big Twin | 1957 | |
| Harley Davidson | Duo Glide | Big Twin | 1958 | |
| Harley Davidson | Duo Glide | Big Twin | 1959 | |
| Harley Davidson | Duo Glide | Big Twin | 1960 | |
| Harley Davidson | Duo Glide | Big Twin | 1961 | |
| Harley Davidson | Duo Glide | Big Twin | 1962 | |
| Harley Davidson | Duo Glide | Big Twin | 1963 | |
| Harley Davidson | Duo Glide | Big Twin | 1964 | |
| Harley Davidson | Electra Glide | Big Twin | 1965 | |
| Harley Davidson | Electra Glide | Big Twin | 1966 | |
| Harley Davidson | Electra Glide | Big Twin | 1967 | |
| Harley Davidson | Electra Glide | Big Twin | 1968 | |
| Harley Davidson | Electra Glide | Big Twin | 1969 | |
| Harley Davidson | Super Glide | Big Twin | 1971 | |
| Harley Davidson | Super Glide | Big Twin | 1972 | |
| Harley Davidson | Super Glide | Big Twin | 1973 | |
| Harley Davidson | Super Glide | Big Twin | 1974 | |
| Harley Davidson | Super Glide | Big Twin | 1974 |