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About product and suppliers:
        Alibaba.com offers 659 ngk spark plugs products. About 1% of these are tool parts. 

A wide variety of ngk spark plugs options are available to you, such as free samples. 

There are 650 ngk spark plugs suppliers, mainly located in Asia. The top supplying countries are China (Mainland), South Korea, and Japan, which supply 97%, 1%, and 1% of ngk spark plugs respectively. 

Ngk spark plugs products are most popular in Domestic Market, Western Europe, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 99 with ISO9001, 9 with ISO/TS16949, and 2 with Other certification.