Iridium IX Spark Plug (TR5IX)
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NGK Iridium IX Spark Plug (TR5IX)

Part No. 7397 Warranty Details  

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Laser-welded iridium center electrode is resistant to heat, corrosion and electrical wear. The tapered ground electrode minimizes quenching. Provides outstanding acceleration, high fuel efficiency and durability.

Product Features:
  • 0.6 mm iridium-tip center electrode provides durability and a high melting point
  • Taper-cut ground electrode shape provides improved flame reproduction
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Center Electrode Core Material:Copper Core
Center Electrode Tip Material:Iridium
Electrode Core Material:Iridium
Electrode Tip Material:Iridium
Gap Size:0.04 in
Ground Configuration:Standard
Ground Electrode Core Material:Nickel Core
Ground Electrode Quantity:1
Ground Electrode Tip Design:Taper Cut
Ground Strap Quantity:1
Hex Size:5/8 in
Manufacturer Heat Range:5
Reach:17.5 mm
Resistor:Yes
Seat Type:Tapered
Shorty Spark Plug:No
Spark Plug Approximate Resistor Value:5K Ohm
Thread Diameter:14 mm
Tip Configuration:Loose
Type:Iridium IX
Wrench Diameter:5/8 in

REVIEW SNAPSHOT®

by PowerReviews
NGKIridium IX Spark Plug (TR5IX)
 
4.3

(based on 30 reviews)

Ratings Distribution

  • 5 Stars

     

    (20)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (4)

89%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (16)
  • Increases power (16)
  • Easy to install (10)
  • Durable (8)

Cons

No Cons

Best Uses

  • Everyday driving (17)
  • Replacement (12)
  • Performance driving (10)
    • Was this a gift?:
    • No (4)
    • Reviewer Profile:
    • Auto enthusiast (13), Casual driver (8), Truck enthusiast (6)

Most Liked Positive Review

 

Great Plugs

I installed these plugs in a 2000 5.3 liter Chevy 1500 Silverado. The engine had been pinging and a rough idle even with midgrade fuel for several years even though a local garage had...Read complete review

I installed these plugs in a 2000 5.3 liter Chevy 1500 Silverado. The engine had been pinging and a rough idle even with midgrade fuel for several years even though a local garage had done a tune-up and replaced the plugs. The plugs I removed were a double platinum type which some readers have given poor reviews. These Iridium plugs gave new life to the engine. I never really noticed any vibration before but now it's like an electric motor smooth and much better acceleration. I haven't checked the fuel mileage but I bet it will be better. The old plugs looked clean and didn't show any wear. I recommend these plugs. Always double check with the manufacturer for proper selection. Also I needed to reset the gap on these plugs from the .40 to a .60 per Chevy recommendation.

VS

Most Liked Negative Review

 

Not for chevy !

I have always used ngk for all my cars but this time. not so good chevy sliverado 2000 and up doesn't run right it misses fire on all gap settings. so it seems you...Read complete review

I have always used ngk for all my cars but this time. not so good chevy sliverado 2000 and up doesn't run right it misses fire on all gap settings. so it seems you have to go with AC delco.

Reviewed by 30 customers

Displaying reviews 1-10

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5.0

great product, good price with 15% discount.

By 

from austin, Tx

Verified Buyer

Comments about NGK Iridium IX Spark Plug (TR5IX):

Last set of these Iridium plugs ran 128,000 miles, gap had increased to .060 when I measured on the old plugs ... truck still ran fine, but I replaced with new plugs.

  • Was this a gift?:
  • No

(0 of 1 customers found this review helpful)

 
1.0

Started missing in 5000 miles.

By 

from Virginia

Comments about NGK Iridium IX Spark Plug (TR5IX):

These expensive NGK plugs started missing pretty bad in a Ford Ranger within a 5000 mile window. From now on it's Motorcraft in my Ford products and AC Delco in my GM products.

  • Was this a gift?:
  • No
 
5.0

I would buy this again

By 

from Greenville NC

Verified Buyer

Comments about NGK Iridium IX Spark Plug (TR5IX):

Tune up for my GMC Yukon

  • Was this a gift?:
  • No
 
4.0

NGK Iridium IX TR51X

By 

from Wethersfield,CT

Verified Buyer

Comments about NGK Iridium IX Spark Plug (TR5IX):

I bought based on good reviews. I ordered online with store pickup so I got the online discount. Ordering and pickup were great. Plugs were well packaged to prevent damage. I checked gaps and all were good. Started right up after installing. Been driving with the new plugs for two days and so far so good

  • Was this a gift?:
  • No

(1 of 1 customers found this review helpful)

 
4.0

Great set of spark plugs

By 

from Va

Verified Buyer

Comments about NGK Iridium IX Spark Plug (TR5IX):

I've installed these spark plugs on different vehicles 4,6,8 cyl and performance plus increased mileage has always come thru on eash vehicle.

 
5.0

Great plug i would buy again

By 

from Saint albans wv

Verified Buyer

Comments about NGK Iridium IX Spark Plug (TR5IX):

Great plug noticeable throttle response

 
5.0

2006 Trailblazer ext. 5.3

By 

from Grand Rapids, MI

About Me Truck Enthusiast

See all my reviews

Verified Buyer
3 or more reviews submitted

Pros

  • Easy To Install
  • Improves Engine Efficiency
  • Increases Power

Cons

    Best Uses

    • Everyday Driving
    • Replacement

    Comments about NGK Iridium IX Spark Plug (TR5IX):

    Installed in a 2006 Trailblazer with a 5.3. No issues with the install and so far no issues with performance.

     
    5.0

    Best plugs out there!

    By 

    from Panama City

    Verified Buyer

    Comments about NGK Iridium IX Spark Plug (TR5IX):

    Nothing's better than NGK

    (0 of 1 customers found this review helpful)

     
    1.0

    2000 GMC 4.8 liter

    By 

    from Georgia

    About Me Auto Enthusiast

    Pros

      Cons

      • No Improvement In Performance

      Best Uses

        Comments about NGK Iridium IX Spark Plug (TR5IX):

        Installed NKG's in my truck and had DTC codes pop up. Installed new wires too. Had to replace them with AC Delco plugs to get my truck to run properly.

        (1 of 1 customers found this review helpful)

         
        5.0

        Good plugs

        By 

        from MD

        About Me Casual Driver

        See all my reviews

        3 or more reviews submitted

        Pros

        • Improves Engine Efficiency
        • Increases Power

        Cons

          Best Uses

          • Everyday Driving

          Comments about NGK Iridium IX Spark Plug (TR5IX):

          My 2006 Chevy Avalanche had 75k miles. Didn't need a tuneup until 100,000. But read on Avalanche forums that many people were installing around 70k miles. Installed these plugs with new MTD wires and Avalanche now how great power. Liked so much that I bought NGK plugs and wires for my 2002 Chevy Corvette Z06

          Displaying reviews 1-10

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          Do you have questions about this product?

           

          Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

          12 Questions | 12 Answers
          Displaying questions 1-10Previous | Next »
          • Q:

            What is the gap setting NGK TR5iX 1998 ranger 3.0?
            Asked on 8/20/2016 by None from NC

            1 answer

            • CUSTOMER CARE

              A:

              Hi Customer, glad to assist you! This NGK Iridium IX Spark Plug (TR5IX) (Part No. 7397) is an exact fit for your 1998 Ford Ranger 3.0L and it is pre-gapped at 0.040 inch from factory. All the spark plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. Those with modified engines must remember that a modified engine with higher compression or forced induction will typically require a smaller gap settings.

              Answered on 8/22/2016 by Steve from AAP
          • Q:

            Will this spark plug have a good performance on a 2000 ranger 3.0
            Asked on 11/22/2015 by Mark

            1 answer

            • CUSTOMER CARE

              A:

              Hi Mark, I'm glad to assist you. This NGK Iridium IX Spark Plug (TR5IX) (Part No. 7397) is an exact fit for your 2000 Ford Ranger 3.0L. The fine wire center electrode in this spark plug ensures high durability and a consistently stable spark. The corrugated ribs prevent flash-over.

              Answered on 11/23/2015 by Solomon from AAP
          • Q:

            What Country are they made in?
            Asked on 12/4/2014 by JOEJOE

            1 answer

            • CUSTOMER CARE

              A:

              Hi Joejoe, Advance Auto Parts does sell Made in the USA products as well as products manufactured from many other countries in order to keep our pricing competitive. Please also keep in mind that many suppliers have multiple manufacturing plants that could result in different countries of origin for the same part.

              Answered on 12/4/2014 by Steve from AAP
          • Q:

            How many miles before replacing.
            Asked on 11/6/2014 by sweepy from moorestown nj

            1 answer

            • CUSTOMER CARE

              A:

              Hi Sweepy, glad to help you! The NGK iridium IX spark plug have a life expectancy of 40-50k miles. However, it depends upon the driving conditions and motor modifications. Typically we have found you can expect 60,000 to 80,000 miles on an unaltered motor.

              Answered on 11/7/2014 by Steve from AAP
          • Q:

            what is the gap for 2003 s-10, 2.2 liter
            Asked on 3/20/2014 by long-one

            1 answer

            • CUSTOMER CARE

              A:

              I'm glad to assist you! This spark plug is pre gaped at 0.040 - inch from factory.

              Answered on 3/21/2014 by Steve from AAP
          • Q:

            what is the gap for a 2000 chevy cavalier
            Asked on 12/28/2013 by James from United States

            1 answer

            • CUSTOMER CARE

              A:

              Hi James! Good question. This Spark Plug was gaped at 0.040 - inch for your vehicle.

              Answered on 12/28/2013 by Max from AAP
          • Q:

            are they good for towing boat
            Asked on 4/24/2013 by russ from flagler beach fl

            1 answer

            • CUSTOMER CARE

              A:

              Sorry, this NGK Iridium IX Spark Plug (TR5IX) (Part No. 7397) is not compatible for towing boat. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

              Answered on 4/24/2013 by Max from AAP
          • Q:

            •Iridium IX Series; TR5IX; @ Gap .040 @ on 2001 book sead .60 who is wright
            Asked on 1/12/2013 by Art from Hampton Va

            1 answer

            • CUSTOMER CARE

              A:

              This NGK Iridium IX Spark Plug (TR5IX) - (Part No. 7397) comes with a gap 0.040 inches and it has Ultra-fine 0.6-mm diameter iridium. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

              Answered on 1/13/2013 by Aaron from AAP
          • Q:

            Is this a price for one or 6? I need 6, do they come in a set of 6?
            Asked on 12/21/2011 by Anonymous

            1 answer

            • CUSTOMER CARE

              A:

              This NGK Iridium IX Spark Plug manufactured by NGK is sold individually. This spark plug has 0.6 mm iridium-tip center electrode which provides durability and a high melting point.

              Answered on 12/21/2011 by Vincent from AAP
          • Q:

            how to replace spark plugs in a 2004 tahoe
            Asked on 11/12/2011 by t rone from jackson, ms

            1 answer

            • CUSTOMER CARE

              A:

              Remove Spark plug wire from spark plug. There will be metal casing around the plug, you need to pull the casing and wire at the same time. Use a 5/8 socket and ratchet and turn counter clockwise to remove them and clockwise to install them. Then reattach plug wire and your good to go.

              Answered on 11/13/2011 by Dennis from AAP
          Displaying questions 1-10Previous | Next »

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