NGK 97100 TR4BHX Ruthenium HX Spark Plug

NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for todays modern vehicles. Patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy. Created from advanced OE technology as a high ignitability plug; Ruthenium HX spark plugs come with patented, specialized OEM DFE and PSPE tip designs. NGK Ruthenium HX High Ignitability spark plugs provide a more complete fuel burn resulting in a quicker throttle response, smoother idle and better cold starts. Ruthenium center electrode provides industry leading durability.

• Combines 0.6 millimeter ruthenium center with a unique cut-back PSPE ground electrode
• NGK's patented ruthenium technology produces maximum performance, ignitability & durability at high temperatures
• Projected square platinum electrode shape of the ground electrode provides the best ignitability and service life for high heat engines
• 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
• Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
• Modern vehicles using OE PSPE type spark plugs or for those seeking an aftermarket plug with the latest OE technology

• Ruthenium Center Electrode
• Tapered
• 14mm Thread Diameter
• 1.25mm Thread Pitch
• 18mm Reach
• 5/8" Hex Size
• Solid Terminal 
• .043" Gap
• Fine Wire
• 0.6mm
• Platinum Ground Electrode
• Resistor
• 5k Ohm
• Heat Range 4
• Torque Specs
• Cast Iron: 10.8-18 lb. ft. Aluminum: 7.2-14.5 lb. ft.
• 60-120k Mile Longevity