This product has been discontinued

NGK 4457 R7376-10 Iridium/Platinum Spark Plug


  • Manufacturer: NGK


Manufacturer Part Number: R7376-10
Manufacturer Stock Number: 4457

NGK 4457 R7376-10 Iridium/Platinum Spark Plug

NGK Racing Series Plugs are Engineered to Withstand the Harshest Engine Conditions.

Fine Wire Iridium Tipped Center Electrode and Fine Wire Platinum Tipped Ground Electrode Ensures Slow Wear Rate Providing Stable Idle, Superior Anti Fouling, Improved Fuel Efficiency and Lower Emissions.

  • Special Insulator Nose Configurations Improve Throttle Response
  • Corrugated Ribs Prevent Flashover
  • Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer
  • Copper Core Aids in Heat Removal
  • Triple Seals Prevent Leakage

Plug Specifications
  • Thread Size: 14mm
  • Hex Size: 13/16" (20.6mm)
  • Reach: 19mm (3/4")
  • Seat Type: Gasket
  • Gap: .024" (0.61mm)
  • Heat Range: 10
  • Terminal Type: Solid
  • Resistor: Yes

Center Electrode
  • Type: Fine Wire
  • Material: Iridium
  • Projection: Non-Projected

Ground Electrode
  • Type: Angled Fine Wire
  • Material: Platinum
  • Quantity: 1