10mm Magnecor Spark Plug Wire SET for 74-85 Mazda RX-7,2,3,4, Cosmo, P/U. Spark Plug Wires have a limited life. We normally see deterioration and/or mis-firing by at least 60,000 miles. Mis-fires can be evident using a high quality Timing Light or a diagnostic scope, even when not noticeable during normal driving. New wires should be […]
