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WR78 Bosch Super 4 Spark Plug x4 364366

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Bosch WR78 Super 4 Spark Plug x4

Super 4 - The Perfect Upgrade

  •  Improved ignition
  •  Reliable engine protection
  •  Improved fuel efficiency
  •  Better acceleration
  •  Better engine response


  •  Surface gap technology
  •  4 Thin ground electrodes
  •  Nickel-plated shell with rolled threads
  •  Ribbed insulator design
  •  Pre-gapped
  •  Copper core


  • Prevents carbon fouling and enables self-cleaning
  • Less quenching, less energy loss and superior fuel efficiency
  • Provides complete anti-seize and corrosion protection
  • Prevents misfires due to flash-over
  • No need to gap for faster installation
  • Provides broader heat range to resist pre-ignition and fouling