NGK Ruthenium HX Spark Plugs (6 Pack)

Upgrade your stock LF3/4 spark plugs for tuning with Schmidty Tuning! NGK Ruthenium HX is designed for newer engines which demand high ignitability. Projected Square Platinum Electrode (PSPE) design promotes spark energy concentration & ignites a wider range of air-fuel ratios, offering improved performance in rich or lean engine conditions. 0.4mm Ruthenium alloy fine wire center electrode and 0.8mm platinum fine wire ground electrode.  Must re-gap plugs to Schmidty Tuning's recommendation for your custom tune application *PACK OF SIX (6) TOTAL PLUGS*