12mm - 1.0625 in Reach - Tapered Seat - Single Pack;

12mm - 1.0625 in Reach - Tapered Seat - Single Pack;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;
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MSD 3717 Iridium Spark Plug

16.35

12mm - 1.0625 in Reach - Tapered Seat - Single Pack;

12mm - 1.0625 in Reach - Tapered Seat - Single Pack;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;

  • 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