MSD Iridium Spark Plug 1IR5L Resistor Type with Extended Projected Tip MSD3712

Iridium Spark Plug 1IR5L Resistor Type with Extended Projected Tip

Tapered Seat. 14mm x .691" with 5/8" Hex

MSD3712

D3712

MSDs 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 outDesigned for use on high performance vehicles that utilize high output ignition systemsMachined electrode increases exposure to the flame to improve combustionMSDs proprietary ceramic formula provides the highest dielectric strengthYttrium ground electrode reduces the chance of pre-ignitionIridium tip improves cold startsDesigned to outlast other performance plugs on the track or on the streetAll spark plugs tested prior to packaging and shippingShorty-style plugs for applications where space is limitedWhat makes MSDs Iridium plugs a cut above the competition? Besides MSD's race winning experience of firing 330 mph top fuel cars, the endurance of 500 mile stock car racing and the brutal expectations of off-road racing, our new spark plugs are designed to perform from the inside out.