Spark plug · NGK
Equivalents for the NGK spark plug 6668
Meet the NGK 6668 spark plug. Compare its 67 equivalents and find the cheapest compatible plug: NGK, Bosch, Champion, Denso and more.
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What can replace a NGK 6668 spark plug?
The NGK 6668 is interchangeable with: NGK LFR6A, Bosch FR 7 ME, Champion OE035, NGK LFR6B, NGK LFR6B-D, NGK LFR6A-11. These spark plugs share the same mounting (thread, seat) and heat range.
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.