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NGK Iridium IX Spark Plugs LFR5AIX 11 Review

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By Best Choice team
Checked icon Last updated - June 28, 2025
9.3

Verdict overview

  • worth the money 9.4
  • Long life 9.3
  • distance 9.3
Pros
  • Extends engine life significantly.
  • Ideal for turbo and fuel-injected engines.
  • Improves fuel efficiency.
Cons
  • Possibility of future issues.

Tech specs

product dimensions 3.7 x 0.94 x 4.98 inches
manufacturer part number LFR5AIX-11
item weight 0.01 ounces
customer reviews4.7 out of 5 stars 2,709 4.7 out of 5 stars

Product Overview

If you re looking for a high performance spark plug that will stand the test of time, then look no further than the NGK Iridium IX Spark Plugs LFR5AIX 11. This spark plug is designed for fuel injected and turbo engines, providing an extreme performance upgrade via OEM spark plugs and offering a lifetime at 40,000 to 50,000 miles.

The NGK Iridium IX Spark Plugs are made with a fine wire Iridium center electrode and nickel alloy terrain electrodes for maximum engine efficiency and torque. This ensures that your vehicle runs smoother, faster, and more reliably. Furthermore, the precision laser electrode construction ensures a precise fit between the spark plug and the cylinder head to reduce misfiring.

Another major benefit of these spark plugs is their longevity. They are rated to last up to 40,000 or 50,000 miles, depending on usage conditions. This means you can be sure that you wont have to replace them anytime soon allowing you to save money in the long run. As an added bonus, these plugs come with a limited warranty in case of any defects or issues.

In terms of value for money, these plugs offer excellent value. While they may seem expensive at first glance, they will save you money in the long run by lasting longer than other brands of spark plugs. Additionally, they are designed with quality materials which ensure maximum performance and reliability further adding to their value for money rating.

Overall, I highly recommend the NGK Iridium IX Spark Plugs LFR5AIX 11 as an excellent choice for anyone looking for a reliable spark plug that will last them many years and provide maximum performance. These plugs are ideal for fuel injected and turbo engines due to their extreme performance upgrade via OEM spark plugs and their long lifespan of up to 40,000 or 50,000 miles. Furthermore, they offer excellent value for money due to their quality materials which ensure maximum performance and reliability while also saving you money in the long run by lasting longer than other brands of spark plugs.

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The secret behind our reviews

By Best Choice team

Best Choice Team is your go-to source for curated product recommendations across various categories. Leveraging years of industry experience and advanced AI technology, we analyze data from multiple sources to bring you the most relevant and up-to-date product lists.

Our AI-driven approach allows us to streamline the selection process, ensuring that the products we feature align with current market trends and consumer preferences. We aim to provide content that helps you navigate your purchasing decisions with greater ease Like.

Users reviews

93% of reviewers would recommend to a friend, Based on 5,418 Reviews

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