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Ngk Iridium Spark Plug Comparison - September 2025

1
Best Choice
9.8Exceptional
2
9.7Exceptional
3
9.6Exceptional
4
Best Value
9.4Excellent
5
9.3Excellent
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Model

NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix), 4 Pack
Model
NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack
Model
NGK 6619 Iridium Spark Plugs LFR6AIX-11-6 PCSNEW
Model
NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)
Model
NGK (4469) LFR5AIX-11 Iridium IX Spark Plug (8 Pack)

Brand

NGK
Brand
NGK
Brand
NGK
Brand
NGK
Brand
NGK

Reviews

3,988 reviews
Reviews
2,620 reviews
Reviews
5,416 reviews
Reviews
8,126 reviews
Reviews
1,238 reviews

Features

Worth the money

9.6
Worth the money
9.6
Worth the money
9.3
Worth the money
9.4
Worth the money
9.1

Distance

9.4
Distance
9.6
Distance
9.1
Distance
9.4
Distance
9.1

Long life

9.4
Long life
9.3
Long life
9.3
Long life
9.3
Long life
8.9

Tech Specs

item weight

0.16 ounces
item weight
6.4 ounces
item weight
0.01 ounces
item weight
1.44 ounces
item weight
0.01 ounces

manufacturer part number

93501
manufacturer part number
93175
manufacturer part number
LFR6AIX-11
manufacturer part number
DCPR7EIX
manufacturer part number
4469

customer reviews

4.7 4.7 out of 5 stars 1, 994 ratings 4.7 out of 5 stars
customer reviews
4.8 4.8 out of 5 stars 1, 310 ratings 4.8 out of 5 stars
customer reviews
4.7 4.7 out of 5 stars 2, 708 ratings 4.7 out of 5 stars
customer reviews
4.7 4.7 out of 5 stars 4, 063 ratings 4.7 out of 5 stars
customer reviews
4.7 4.7 out of 5 stars 619 ratings 4.7 out of 5 stars

product dimensions

5.83 x 4 x 1 inches
product dimensions
5.83 x 4 x 1 inches
product dimensions
3.7 x 0.94 x 4.98 inches
product dimensions
-
product dimensions
3.7 x 0.94 x 6.64 inches

exterior

Painted
exterior
Painted
exterior
-
exterior
Painted
exterior
-

model

Spark Plug
model
Spark Plug
model
-
model
NGK DCPR7EIX
model
-

Review

-
Review Review Review Review
-

Available On

Available On Available On Available On Available On

Our Top 3 Picks

Here are the top 3 recommended products with more information to help you find the right product for you
  • 9.8
    1
    NGK

    NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix), 4 Pack

    9.6 worth the money
    9.4 distance
    9.4 Long life

    Why we love it

    Improves throttle response significantly.
    Durable with high heat resistance.
    Cost-effective compared to OEM options.
  • 9.7
    2
    NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack
    NGK

    NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack

    9.6 worth the money
    9.6 distance
    9.3 Long life

    Why we love it

    High durability with iridium alloy tip.
    Improves throttle response and ignition.
    Pre-set gap for easy installation.
  • 9.6
    3
    NGK

    NGK 6619 Iridium Spark Plugs LFR6AIX-11-6 PCSNEW

    9.3 worth the money
    9.3 Long life
    9.1 distance

    Why we love it

    Wide heat range for versatile use.
    Durable and long-lasting performance.
    Recommended by mechanics for reliability.

Our ranking system

At BestChoice.com, our team curates a selection of top products from a vast array available online, using a sophisticated ranking system based on carefully defined criteria.While traditional hands-on testing has its merits, our use of AI technology offers distinct advantages. AI allows us to process and analyze vast amounts of data from multiple sources, providing a comprehensive view that goes beyond what manual testing can achieve. This approach enables us to deliver insights that are aligned with current trends and consumer preferences, ensuring our reviews are both relevant and up-to-date.

Features

Our AI-driven analysis examines key attributes, capabilities, and other critical factors tailored to each product category. This method allows us to assess effectiveness from various perspectives, ensuring a well-rounded evaluation.
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Consumer Reviews

We aggregate and evaluate consumer feedback from across the internet, giving weight to ratings and reviews that reflect the most reliable insights. AI enhances this process by filtering and prioritizing data, offering a balanced view without the need for direct personal endorsements.
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Popularity

Our system also considers the popularity of products, analyzing factors such as market presence, reputation, and user satisfaction. By leveraging AI, we capture a comprehensive picture of a product's standing in the market, which may not always be evident through traditional testing.
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Value for money

AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.
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