Ngk 3913 R56709 Racing Plugs 4bx

Out of stock
Stock Update:
01/03/2022 10:59:51 AM PST

Out of stock

Stock Update:
01/03/2022 10:59:51 AM PST
Frequently bought together:


This item is brand-new, factory sealed.

R56709 Racing Spark Plugs 4Box
  • Replacement racing spark plug used by many professional car drivers
  • Specifically designed with colder heat ranges than the factory plug to enable performance modifications and handle intense conditions
  • Contains an Yttrium-enhanced alloy to enable up to 8% reduction in side wire temperature for improved durability and less pre-ignition
  • Manufacturer: ?NGK
  • Brand: ?NGK
  • Model: ?3913
  • Item Weight: ?8 ounces
  • Product Dimensions: ?4.06 x 3.36 x 0.93 inches
  • Item model number: ?3913
  • Exterior: ?Machined
  • Manufacturer Part Number: ?3913

Autolite Copper Core Spark Plugs deliver quick starts, improved fuel economy, and smooth acceleration. The copper-glass seal bonded insulator, terminal post, and center electrode ensure a tight seal that is 100 percent leak-proof, and the full copper core electrode improves heat transfer and optimizes plug life. Copper Core Spark Plugs feature high alumina ceramic for high dielectric strength, and a steel shell for installation robustness. The multi-rib insulator reduces the danger of "flash over" to prevent misfires, and the copper core center electrode provides higher thermal conductivity. These spark plugs are engineered with a high nickel alloy center and ground electrode for extended life. Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Since its inception, the Autolite brand has provided the automotive aftermarket and Original Equipment manufacturers the highest quality ignition products. Designed and engineered in the USA.

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Warranty Information

All Items are Brand New, Factory Sealed and come with a standard warranty. [Read our policies]
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Ngk 3913 R56709 Racing Plugs 4bx