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Mercedes-Benz

Spark Plug Set, M157 / M278
Purchase Spark Plug Set, M157 / M278
  • SKU: 01-157-00727-0

    Spark Plug Set, M157 / M278

  • $174.99

  • Prop 65 warning
    Warning

    This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Manufacturer Weistec
Engine Family M157
year make model trim engine
2020 Mercedes-Benz SL550 Base (R231) Twin Turbo 4.7L V8 (M278)
2019 Mercedes-Benz SL550 Base (R231) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz SL550 Base (R231) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz SL550 Base (R231) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz SL550 Base (R231) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz SL550 Base (R231) Twin Turbo 4.7L V8 (M278)
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Weistec M157 / M278 spark plugs are designed and manufactured for not only high power applications but also factory replacement. The factory plugs do not handle the M157’s high cylinder pressures very well and frequently result in misfire problems, even on unmodified vehicles.

The M157 / M278 spark plugs are also 1 step colder to help prevent pre-ignition in engines that are making more power than stock allowing you to further push the envelope of your vehicle.

Key Features:

  • Higher Output for High Boost Applications

  • Colder range for better performance with increased horsepower levels

  • Direct replacement / bolt in for M157 / M278 engines

  • Suitable for all M157 / M278 vehicles from stock to highly modified

  • Set of 8

* Important: Please be sure to check and set spark plug gap prior to installation.