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Replacement Parts

Spark Plugs & Wires

Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug

Please be aware orders placed now will not arrive in time for Christmas, please check delivery times.

Denso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug
- Single Plug
- Denso # 3421
- Extra Long Life Iridium Plug
- 0.7mm Fine Wire Iridium-Tipped Center Electrode
- Platinum Tipped Ground Electrode
Iridium plugs have an extremely long life as Iridium is 6x harder and 8x stronger than platinum. Because of the strength and hardness of iridium, there is virtually no electrode wear. This combined with a platinum tipped ground electrode, creates a spark plug that is almost impervious to wear even under extreme driving or racing conditions.
Country USA
Brand Denso
Manufacturer Denso
Binding Automotive
ItemPartNumber 3421
Model SK20HR11
UnitCount 1
UPCs 042511034211
EANs 0042511034211
ReleaseDate 0000-00-00

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