MSD37414 MSD IRIDIUM SPARK PLUG - SHORTY 14mm - .4375 in Reach - Tapered Seat - 4 Pack

Heat Range 6 Length Shorty Quantity 4 Reach 0.4375 Seat Type Tapered Thread Size 14mm

Designed to outlast other performance plugs on the track or on the street Unique insulator design improves spark isolation Superior design for high performance engines Iridium - 40% higher melting point than nickel plugs Lower voltage Requirements for longer coil life