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Copper Plus RF9YC resistor spark plug with 18 mm thread and tapered seat. Factory preset gap 0.035" / 0.90 mm.
Champion Copper 409
409
zł21.95
| Delivery within 2-3 business days
Copper Plus RF9YC resistor spark plug with 18 mm thread and tapered seat. Factory preset gap 0.035" / 0.90 mm.
Champion 409 is a Copper Plus RF9YC spark plug with a copper core and nickel electrodes. The resistor design helps reduce EMI/RFI electrical interference, while the tapered seat requires a cylinder head designed for this sealing style.
Application / fitment
The plug is cataloged for selected older Ford V8 applications, including 289 / 4.7 L, 427 / 7.0 L and 428 / 7.0 L, and related uses requiring an RF9YC plug. Before installation, compare thread size, reach, seat type, heat range and required spark gap.
- part type: spark plug
- series: Copper Plus
- plug type: RF9YC
- typical use: selected older petrol engines with tapered spark plug seats
Technical information
- thread diameter: 18 mm / 0.709"
- reach: 0.429" / 10.90 mm
- hex: 13/16" / 20.65 mm
- seat type: tapered
- preset gap: 0.035" / 0.90 mm
- heat range: Champion 9
- center electrode tip material: nickel
- terminal: non-removable nut
- washer included: no
- sale unit: 1 piece
