£4.37
Champion RA4YC OE230 Spark Plug Copper Plus
£5.42
Why The Green Spark Plug Company
- Vast stock of vintage and modern spark plugs
- Specializes in veteran, vintage, classic engines
- Fast, worldwide shipping and secure packaging
About the product
The Champion RA4YC / OE230 Copper Plus is a spark plug with a copper-core centre electrode, a patented Ultraseal-coated shell and a patented SAC-9 semiconductor resistor. It replaces Z291.
It is described for replacing original-equipment spark plugs in vehicles, mowers or weed whackers. Check the spark plug’s specification and compare it carefully with the original before ordering or installing. Vehicle compatibility and component cross-references are for general guidance only; they do not constitute a contractual term, representation or warranty, and no responsibility is accepted for claims arising from their publication.
At a glance
- Copper-core centre electrode
- Patented Ultraseal-coated shell
- Patented SAC-9 semiconductor resistor
- Replaces Z291
Specifications4
- Compatible with
- Replaces Z291
- Centre electrode
- Copper-core
- Shell coating
- Patented Ultraseal coating for corrosion resistance
- Resistor
- Patented SAC-9 semiconductor resistor
Price history
Now
£5.42
Lowest, Aug–Oct
£5.41
Highest
£5.42
Price at the shop, last 80 days
The price has stayed at £5.42 since 4 October. It has been lower in this period: £5.41 (19 Aug – 3 Oct).



