Iridium Spark Plug

14mm Thread - .691 in Reach - Tapered Seat - 4 Pack

MSD's spark plugs are engineered to improve the efficiency of the combustion process to create the most power possible combined with increased durability. The center tip of the plug is made from iridium to promote the best spark and increase resilience. A proprietary ceramic material enhances the dielectric strength of the plug housing forcing the spark, even under extreme cylinder pressures, to jump across the plug gap to the ground electrode. This electrode is machined to expose more spark to the incoming gases to promote the most effective combustion event possible.

Proprietary plug design inside and out

Designed for use on high performance vehicles that utilize high output ignition systems

Machined electrode increases exposure to the flame to improve combustion

MSD’s proprietary ceramic formula provides the highest dielectric strength

Yttrium ground electrode reduces the chance of pre-ignition

Iridium tip improves cold starts

All spark plugs tested prior to packaging and shipping

Unique insulator design improves spark isolation

Lower voltage Requirements for longer coil life