NGK SPARK PLUGS part description

Iridium S.Plug

Product Description

NGK Laser Iridium Spark Plug

Features & Benefits

  • NGK Laser Iridium spark plugs offer the best combination of performance and longevity. Actual OE or equivalent replacement spark plug.
  • ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction fine wire iridium alloy center electrode provides consistent performance
  • Laser Iridium plugs are tested to the highest standards to ensure quality and durability. Engineered specifically for OE applications.
  • IRIDIUM ALLOY CENTER ELECTRODE: Iridium's density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
  • Iridium tipped center electrode provides durability six times harder than platinum. NGK's high-grade pure alumina ceramic and 98% pure copper core prevents the spark plug from overheating while providing reliable starts.
  • PLATINUM TIP GROUND ELECTRODE: Unless OE specified, platinum protection at the ground electrode provides excellent ignitability and service life
  • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
  • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
  • RECOMMENDED USAGE: Best for vehicles with OE fine wire iridium alloy plugs

Product Attributes

Stock Number 93594
Part Number LTR6GI-8
Short Style Spark Plug No
Service Number LTR6GI-8
Resistance 5000.0 82
Ground Electrode Tip Design Standard
Ground Configuration J-Gap
Ground Electrode Core Material Nickel
Washer Included No
Grade Type Performance
Electrical Terminal Type Non-Removable Nut
Center Electrode Core Material Copper
Center Electrode Tip Material Iridium
Pre-Gap Size .032 IN
Ground Electrode Quantity 1
Hex Size 5/8" (16mm)
Insulator Height 2.07 IN
Manufacturer Heat Range 6
Seat Type Tapered
Reach 0.984 IN
Thread Diameter 0.551 IN
Insulator Material Ceramic
Resistor Type Yes
6648 0.0 IN
Ground Electrode Tip Material Nickel
9459 No
9506 0.14 IN
9608 Fine Wire
9805 Mid Projection

Additional Information

Harmonized Tariff Code (HTS) 8511100000
Warranty Time UOM MO
Warranty Time 2
Country of Origin (Primary) JP
UPC 00087295935941
VMRS Code 033003005
UNSPSC 26101732

Part Interchanges

Fits Vehicles

  • Ford Expedition (2015-2018)
  • Ford Transit-350 HD (2015-2024)
  • Ford Transit-350 (2015-2024)
  • Ford Transit-250 (2015-2024)
  • Ford Transit-150 (2015-2024)
  • Lincoln Navigator (2015-2018)
  • Ford Police Interceptor Utility (2014-2019)
  • Ford Police Interceptor Sedan (2013-2019)
  • Ford Explorer (2013-2019)
  • Ford F-150 (2011-2019)
  • Ford Flex (2010-2019)
  • Ford Taurus (2010-2019)
  • Lincoln MKT (2010-2019)
  • Lincoln MKS (2010-2016)

Headquartered in Wixom, Michigan, NGK® is a global leader in the design and manufacture of spark plugs for virtually every automotive and commercial vehicle application. It has grown immensely since its inception in 1936 with the expansion of its ignition product line and the introduction of its technical sensor and vehicle electronics line. NGK partners with OEMs and uses only the latest cutting tools to ensure each NGK product meets OE specifications for exact fit, form, and function. With world-class quality and engineering, NGK’s expertise goes beyond manufacturing the most reliable spark plugs for the automotive industry but also providing the best customer service possible.

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