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DESCRIPTION
Brisk Iridium Performance MR14YIR-9 spark plug.
12mm thread, 1"(26.1mm) reach, (14mm) hex, gasket seat, projected tip, resistor, 0.8mm Iridium center el., cut-back ground el., power focus, flash-over suppression.
An optional choice for a boosted ND seeing track use. Recommended to us by AVO with their turbo kit once we started using that kit for higher boost and track/autocross and had issues with blowing out the spark and we found these helpful for solving that issue. Also used them in our Project ND race with Edelbrock supercharger kit with success.
Price is per spark plug
Torque spec note: The ND uses fine threads for the spark plugs so torque is very low! Just 10-14 ft-lbs is all you need.