NGK TR8IX Iridium IX Spark Plug — Box of 4

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SKU: NGK3691
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK TR8IX Iridium IX Spark Plugs: Unleash Peak Performance

Experience a significant boost in your vehicle's performance with NGK TR8IX Iridium IX spark plugs. Engineered for the discerning performance enthusiast, these plugs are designed to deliver exceptional acceleration, improved fuel efficiency, and remarkable durability. Whether you're pushing your vehicle to its limits on the track or seeking a more responsive daily drive, the TR8IX series is built to excel.

Key Features and Benefits:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a strong, consistent spark, leading to quicker starts, smoother idling, and enhanced throttle response.
  • Superior Durability: Iridium is six times harder than platinum, offering a significantly longer lifespan and consistent performance over time.
  • High Melting Point: The iridium alloy's extremely high melting point makes these plugs ideal for today's high-performance engines that generate significant heat.
  • Optimized Ground Electrode: Features a tapered cut ground electrode designed to improve starting, idling, and overall throttle control.
  • Exceptional Anti-Fouling: Designed to resist fouling, ensuring reliable performance even under demanding conditions.

For drivers who demand the absolute best, NGK Iridium IX spark plugs are the ultimate choice. Elevate your driving experience with the precision and power only NGK can provide. Consider upgrading to NGK Ruthenium HX plugs for even greater performance potential.

Shop GGCRACING for genuine NGK ignition components.

Product Details

Product Description
Part Numbers
Sizing & Fit

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK TR8IX Iridium IX Spark Plugs: Unleash Peak Performance

Experience a significant boost in your vehicle's performance with NGK TR8IX Iridium IX spark plugs. Engineered for the discerning performance enthusiast, these plugs are designed to deliver exceptional acceleration, improved fuel efficiency, and remarkable durability. Whether you're pushing your vehicle to its limits on the track or seeking a more responsive daily drive, the TR8IX series is built to excel.

Key Features and Benefits:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a strong, consistent spark, leading to quicker starts, smoother idling, and enhanced throttle response.
  • Superior Durability: Iridium is six times harder than platinum, offering a significantly longer lifespan and consistent performance over time.
  • High Melting Point: The iridium alloy's extremely high melting point makes these plugs ideal for today's high-performance engines that generate significant heat.
  • Optimized Ground Electrode: Features a tapered cut ground electrode designed to improve starting, idling, and overall throttle control.
  • Exceptional Anti-Fouling: Designed to resist fouling, ensuring reliable performance even under demanding conditions.

For drivers who demand the absolute best, NGK Iridium IX spark plugs are the ultimate choice. Elevate your driving experience with the precision and power only NGK can provide. Consider upgrading to NGK Ruthenium HX plugs for even greater performance potential.

Shop GGCRACING for genuine NGK ignition components.

Product Details

Product Description

About NGK

NGK engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full NGK lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

NGK TR8IX Iridium IX Spark Plugs: Unleash Peak Performance

Experience a significant boost in your vehicle's performance with NGK TR8IX Iridium IX spark plugs. Engineered for the discerning performance enthusiast, these plugs are designed to deliver exceptional acceleration, improved fuel efficiency, and remarkable durability. Whether you're pushing your vehicle to its limits on the track or seeking a more responsive daily drive, the TR8IX series is built to excel.

Key Features and Benefits:

  • Extreme Ignitability: The fine wire iridium center electrode ensures a strong, consistent spark, leading to quicker starts, smoother idling, and enhanced throttle response.
  • Superior Durability: Iridium is six times harder than platinum, offering a significantly longer lifespan and consistent performance over time.
  • High Melting Point: The iridium alloy's extremely high melting point makes these plugs ideal for today's high-performance engines that generate significant heat.
  • Optimized Ground Electrode: Features a tapered cut ground electrode designed to improve starting, idling, and overall throttle control.
  • Exceptional Anti-Fouling: Designed to resist fouling, ensuring reliable performance even under demanding conditions.

For drivers who demand the absolute best, NGK Iridium IX spark plugs are the ultimate choice. Elevate your driving experience with the precision and power only NGK can provide. Consider upgrading to NGK Ruthenium HX plugs for even greater performance potential.

Shop GGCRACING for genuine NGK ignition components.

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