MSD37364 MSD IRIDIUM SPARK PLUG 14mm - .500 in Reach - Gasket Seat - 4 Pack

Heat Range 6 Length Standard Quantity 4 Reach 0.5000 Seat Type Gasket 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