Champion 304 spark plug for the 1998-2003 Ford F-150 V8 5.4L and other vehicles ignites the air-fuel mixture in the cylinder.
- Champion Copper Plus line with a copper core center electrode that controls heat range for longer life
- Coated shell resists corrosion in harsh environments
- Built-in resistor minimizes electrical interference to sensitive electronics
- Pre-gapped at 0.035 in (0.89 mm) to simplify installation
- Engineered for reliable ignition in all weather conditions
Quick facts
- Part: Champion 304 spark plug
- Fits: 1998-2003 Ford F-150 V8 5.4L and other vehicles
- Material: Copper center electrode tip
- Condition: New
Hard starting, a misfire or a rough idle can mean the plugs are worn. Before you replace them, rule out a weak coil, damaged ignition wiring or a fuel problem, since any of those can produce a misfire too. Plugs are normally changed as a full set.
Fits
The 1998-2003 Ford F-150 V8 5.4L, the 1997-2005 Ford Explorer V6 4.0L and the 2006-2011 Ford Focus 4-cylinder 2.0L all take this plug, as do many other vehicles. It is built to meet OE fit, form and function.
Specifications
Fit and size
- Thread diameter: 14 mm (0.551 in)
- Pre-gap: 0.035 in (0.89 mm)
- Seat type: Tapered
- Quantity per vehicle: varies by engine
Build and materials
- Plug type: RS9YC
- Resistor: yes
- Center electrode tip: copper
- Shell: coated
- Grade: standard replacement
- Condition: new
- Country of origin: China
In the box
This listing holds one spark plug, and the 1998-2003 Ford F-150 V8 5.4L takes eight. No washer is included.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Are these Focus plugs right for the 2006-2011 Ford Focus 4-cylinder 2.0L?
Yes. Champion 304 fits the 2006-2011 Ford Focus 4-cylinder 2.0L, which takes four. For any other car, look up its year, make and engine in the "Vehicles it fits" section on this page.
Is this the right Ford Explorer plug for the 1997-2005 Ford Explorer V6 4.0L?
Yes. Champion 304 fits the 1997-2005 Ford Explorer V6 4.0L, and that engine takes six plugs.
Does this spark plug come with a washer?
No. This listing is a single spark plug and no washer is included. The plug has a tapered seat.
What thread size and gap does the RS9YC plug have?
The thread diameter is 14 mm (0.551 in). The plug comes pre-gapped at 0.035 in (0.89 mm).
Is the Champion Copper Plus RS9YC a resistor plug?
Yes. The built-in resistor minimizes electrical interference to sensitive electronics, and the center electrode has a copper core.
