Equivalents for the Wellman spark plug W420
Meet the Wellman W420 spark plug featuring reach 15.2–19.0 mm, heat range medium. Compare its 175 equivalents and find the cheapest compatible plug: NGK, Bosch, Champion, Denso and more.
Technical information Wellman W420 spark plug
- Resistor
- no
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What can replace a Wellman W420 spark plug?
The Wellman W420 is interchangeable with: Bosch CH216, Champion W420, Denso G111, Bosch GLP041, Champion CH90, Champion GX79. These spark plugs share the same mounting (thread, seat) and heat range.
What are the specifications of the Wellman W420?
Reach 15.2–19.0 mm, Heat range Medium, Resistor no, Seat Flat (gasket)
Cross-references and specifications are provided for guidance only. The wrench size can vary by brand, and some data is inferred from the plug code or an equivalent reference. Always check the vehicle manufacturer's recommendation before buying and fitting.