7/8 UNS outside thread.

Inner threaded to suit modern plugs, giving a wider range of available plugs.

Suggested Plugs:
NGK BP6ES
NGK BP5ES
NGK BP4ES

NGK BP6ES plugs are suggested for completely overhauled engines.

Prices subject to change without notice.

All prices include GST.

Tags: Vintage Sparkplugs, Vintage Car Sparkplugs, Vintage Car Sparkplug Replacement, Vintage Car Sparkplug Adaptors