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Iridium tip promotes the best spark and increases plug resilience for longer life
Copper center core enhances electrical conductivity for efficient ignition
Special ceramic insulation increases dielectric strength and withstands high temperatures
Machine ground straps with yttrium improve heat dissipation for high-horsepower applications
Machined electrode design ensures precise fit and optimal spark timing
Summarized by Shop
MSD iridium spark plugs will fire up your engine for optimum performance. These plugs have been engineered from the inside out for efficient combustion to create the most power possible for your setup. MSD's proprietary design features center tips made from iridium--a super hard material that promotes the best spark as well as increased r