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NGK 5657 R5674-8 Racing Spark Plug, Copper Core, Non-Resistor, Heat Range 8

Manufacturer

Part Number

5657
Sale Price

$6.23

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The NGK 5657 (R5674-8) Racing Spark Plug is a copper-core, non-resistor performance spark plug made for competition engines. NGK built the racing line to hold up under the severe heat and mechanical stress of high-RPM, high-compression engines. It is intended for racing use only.

Key Features:

  • NGK part number: 5657. Plug number: R5674-8
  • Copper core: the 98% pure copper core helps dissipate heat and conducts well across a wide heat range
  • V-groove nickel alloy center electrode: helps deliver consistent ignitability
  • Non-resistor design
  • Heat range 8: a colder plug for demanding racing applications
  • 14 mm (M14-1.25) thread with a tapered seat and a 5/8 inch hex
  • Short reach of about 0.441 inch
  • Trivalent metal plating: resists corrosion and seizing for easier installation and removal
  • Cold-rolled threads: help prevent cross-threading and cylinder head damage
  • High-grade alumina silicate ceramic insulator: adds strength and dielectric performance

NGK is a leading OE spark plug supplier and has a long history in racing. The 5657 gives racers a dependable copper-core plug with a racing-specific design.

Products specifications

Stock Number

5657

Part Number

R5674-8

Seat Type

Tapered

Electrical Terminal Type

Non-Removable Nut

Manufacturer Heat Range

8

Ground Electrode Core Material

Nickel

Center Electrode Tip Material

Nickel

Ground Electrode Quantity

1

Pre-Gap Size

.020

Insulator Height

53.00

Hex Size

5/8

Ground Configuration

Standard

Center Electrode Core Material

Copper

Resistance

1

Ground Electrode Tip Design

Standard

Thread Diameter

14.00

Reach

.46

3

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