Check the listing for details. BRISK RACING SPARK PLUGS AR12ZS PREMIUM SILVER TIP MULTI SPARK. Condition: New. Listed at 14.99 USD. MAKE US AN OFFERLIGHTNING FORCE PERFORMANCElightningforceperformance.c** Brisk Brisk Premium Multi-Spark Spark Plug - AR12ZSSilver is the best conductor of any metal! It conducts 560percent more electricity and 481percent more heat than Platinum, and 276percent more electricity and 177percent more heat than Iridium.Brisk offers unique, custom tailored products specific to the needs of the consumer and the application being built/used. Among others, Brisk is also an O.E. supplier for Lamborghini, TM Racing, VW, Volvo, Audi, Seat, Skoda, Opel, Sthil.; Multi Spark plug increases engine power - 3 times the spark; Brisk has covered virtually all our customer?s requirements for a better performing spark plug! Whether its life longevity and low-cost spark plugs for your everyday drivers, or maximum efficiency and durability in a more specific, high performance application, Brisk has the ideal solution for your needs.;For 82 years Brisk has carried a tradition of being the best. Despite of claims, there is no other spark plug manufacturer in the world that offers a spark plug with multiple discharges per single ignition system impulse! Brisk's Silver Racing Spark Plugs are the best solution for high performance and racing engines. These plugs offer the best thermal and electrical conductor of all metals, Silver, which provides an unmatched transfer of electricity and heat, resulting in the most powerful spark. Silver racing spark plugs feature many benefits commonly used in forced induction applications, applications where the ignition system is pushed to the limit and applications with hard to ignite fuels such as alcohol, LPG, Nitro-methane, etc.. The 'spark' produced is so powerful that it burns nanoparticles of the silver center electrode, which further increases the spark energy and ignition ability. Silver racing spark plugs are the most versatile spark plugs produced by Brisk!Features:Best Electric and Heat ConductorSilver Fine Wire Center ElectrodeTapered Ground ElectrodeSpecial High Dialectic Strength InsulatorSuperior Ignition AbilityGood Resistance to FoulingCombustion Chamber EfficiencyExcellent for Total Loss Ignition SystemsSince 1935, Brisk has carried a tradition of being the best. Despite of claims, there is no other spark plug manufacturer in the world that offers a spark plug with multiple discharges per single ignition system impulse!; Brisk has an annual production of more than 50 million spark plugs including Brisk Super spark plugs, Brisk Extra spark plugs, Brisk Forte spark plugs, Brisk Platin spark plugs, Brisk Double Platin spark plugs, Brisk Racing Iridium spark plugs, Brisk Racing Iridium/Yttrium spark plugs, Brisk Silver Racing spark plugs, Brisk LGS Lamborghini spark plugs, Brisk Evolution spark plugs, Brisk ZS/ZC spark plugs, Brisk TXS spark plugs.Title - BRISK PREMIUM MULTI-SPARK SPARK PLUGCenter Electrode Material - SilverHex Size - 5/8 INProjection - ProjectedResistor - YesSeat Type - GasketThread Diameter - 10mm