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Est. 1957
NGK

NGK Racing Spark Plug Box of 4 (R0373A-11)

Box of 4

Sold as a complete box

Per Unit

$112.87

Box of 4 Total

$451.47

$451.47

for box of 4
On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

NGK Racing Spark Plug Box of 4 (R0373A-11). Built for extreme racing conditions with special center electrode designs for durability and ignitability.

Key Features

  • Box includes four R0373A-11 racing spark plugs.
  • Trivalent metal plating offers superior anti-corrosion and anti-seizing properties.
  • Pure alumina silicate ceramic insulator provides superior strength and better heat transfer.
  • Special insulator nose configurations are designed to improve throttle response.
  • Corrugated ribs help prevent flashover.
  • Copper core aids in heat removal.
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About this part

Product Details

NGK is a well-known name in ignition components, often found powering champions across various racing disciplines worldwide. This R0373A-11 racing spark plug, sold in a box of four, is built with extreme use in mind and meant to withstand the most grueling racing conditions you can throw at it.

The center electrode on these NGK racing plugs features special configurations and designs that ensure both durability and reliable ignitability, even under the harshest engine conditions. They bring ultra-high performance across a variety of heat ranges, with special configurations tailored for a wide array of racing applications. The trivalent metal plating offers superior anti-corrosion and anti-seizing properties, making installation and removal much easier. Plus, the copper core aids in heat removal, while corrugated ribs prevent flashover and triple seals prevent leakage, all contributing to improved throttle response.

These plugs are intended for racing use only. Always refer to the manufacturer's installation instructions for proper fitment and torque specifications.

Specifications

Brand
NGK
Manufacturer Part #
5566
UPC
87295155660

Frequently Asked Questions

NGK Racing Spark Plug Box of 4 (R0373A-11)

$451.47