£10
NGK Resistor Spark Plug Cap VD05FMH (8425)
£7.73
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 NGK VD05FMH is a resistor spark plug cap with part number 8425. Its resistor element is pressed between the plug terminal and the high-tension wire connection, and the cap is designed to suppress noise across all frequencies without adversely affecting engine performance.
The construction includes a ceramic resistor element, a phenolic resin plug connector and rubber material. The resistor element is designed to prevent interior flashover and maintain steady resistance. Heat-press insertion contributes to a durable, vibration-resistant construction, while rubber liners at both ends help prevent moisture from causing electrical leakage. The cap is described as suitable for magneto ignition.
At a glance
- Resistor element sits between the plug terminal and HT wire connection
- Designed for noise suppression across all frequencies
- Rubber liners at both ends help prevent electrical leakage from moisture
- Described as ideal for magneto ignition
Specifications5
- Resistor element
- Pressed between the plug terminal and the high-tension wire connection
- Noise suppression
- Designed to provide noise suppression across all frequencies
- Construction materials
- Ceramic resistor element, phenolic resin plug connector and rubber material
- Application
- Described as ideal for magneto ignition
- Moisture protection
- Rubber liners at both ends help prevent moisture-related electrical leakage
Price history
Now
£7.73
Lowest, Aug–Oct
£7.62
Highest
£7.73
Price at the shop, last 80 days
The price has stayed at £7.73 since 4 October. It has been lower in this period: £7.62 (19 Aug – 3 Oct).



