Some weeks ago i changed the plugs of my Skyline with these HKS Superfire Racing M40. Of course the original producer is not HKS but they are made by NGK. These plugs are iridium & platinum for better performance.
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New plugs for my Skyline BNR34 GTR
Category → New plugs for my Skyline BNR34 GTR » Cars , gtr , skyline » Japanese RC Cars