Professional Iridium Spark Plug
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ACDelco Professional Iridium Spark Plug

Part No. 41-110 Warranty Details  

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ACDelco is a global leader in automotive replacement parts and related services and offers quality aftermarket products for most makes and models, including General Motors, Ford, Chrysler, Toyota and Honda, plus many original equipment service replacement parts. ACDelco products can be found in more than 100 countries located on six of the seven continents and are sourced globally to meet the needs of the local markets, including "maintenance" parts commonly replaced during the lifetime of a vehicle (e.g., batteries, oil filters, air filters, wiper blades, shocks and brakes), as well as "repair" parts (e.g., alternators, radiators, chassis and heating/cooling components). ACDelco offers more than 80,000 parts across 37 product lines.

ACDelco has over 100 years of experience in the automotive industry and is a brand of GM Customer Care and Aftersales, a division of General Motors. ACDelco employs a two- or three-tiered distribution model, utilizing a network of appointed wholesale distributors to service independent installers, ACDelco independent service centers, retail and fleet customers.

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Electrode Core Material:Copper
Electrode Tip Material:Iridium
Resistor:Yes
Spark Plug Seat Type:Tapered
Spark Plug Thread Size:14

REVIEW SNAPSHOT®

by PowerReviews
ACDelcoProfessional Iridium Spark Plug
 
4.8

(based on 70 reviews)

Ratings Distribution

  • 5 Stars

     

    (60)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

97%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (50)
  • Easy to install (42)
  • Durable (39)
  • Increases power (38)
  • Lightweight (9)

Cons

  • No improvement in performance (3)

Best Uses

  • Everyday driving (58)
  • Replacement (44)
  • Performance driving (12)
  • Restoration (8)
  • Racing (3)
    • Car & Truck:
    • Auto enthusiast (7), Truck enthusiast (7), Casual driver (6)
    • Reviewer Profile:
    • Casual driver (27), Auto enthusiast (19), Truck enthusiast (18), Mechanic (13), Competitive driver (3)

Most Liked Positive Review

 

Great Sparkplugs

I bought these after having numerous problems with the overrated E3's I had in my LS1 Camaro. The car runs so much stronger and all the problems I experienced with the E3's...Read complete review

I bought these after having numerous problems with the overrated E3's I had in my LS1 Camaro. The car runs so much stronger and all the problems I experienced with the E3's disappeared when the AC Delco iridium plugs went in. Overall stick with these or NGK's for your LSx vehicle, they are the only ones myself and others have found that work best for these cars.

VS

Most Liked Negative Review

 

OK plugs but no rebate

The spark plugs did what they were supposed to do. However, there was a rebate advertized for them and the store on Market street gave me the rebate form but it was not the...Read complete review

The spark plugs did what they were supposed to do. However, there was a rebate advertized for them and the store on Market street gave me the rebate form but it was not the right one and I missed out on the rebate of two dollars each. Needless to say i am not very happy with you guys.

Reviewed by 70 customers

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(2 of 2 customers found this review helpful)

 
5.0

good plugs

By 

from San Antonio, TX

About Me Casual Driver

Verified Buyer
Level 1

Pros

  • Improves Engine Efficiency
  • Increases Power

Cons

    Best Uses

    • Everyday Driving
    • Performance Driving
    • Racing
    • Replacement
    • Restoration

    Comments about ACDelco Professional Iridium Spark Plug:

    These replaced the originals with 120k miles in an 07 Tahoe 5.3 AFM motor. Restored smoothness at idle and acceleration feels smoother and harder. Great plugs.

    Comment on this review(earn points)

    (2 of 4 customers found this review helpful)

     
    5.0

    Correct plug for GM 5.3L LC9 V8

    By 

    from Austin Texas

    About Me Mechanic

    Verified Buyer
    Level 1

    Pros

    • Same As Factory Plug

    Cons

      Best Uses

      • Everyday Driving
      • Replacement

      Comments about ACDelco Professional Iridium Spark Plug:

      This is a direct factory replacement for the GM AC delco plug. If you have a 5.3L V8, I would check #1 and #7 for signs of oil fouling. If you have this - see GM about a Technical Service bulletin - your engine is likely using oil and you need new parts in the PCV system (rocker cover) and the dealer needs to drop the pan and install a splash shield. The problem is related to the AFM system that runs the engine on only 4 cylinders. The more you run in 4 cylinder mode, the more oil the engine uses. Eventually you will oil foul the plugs and misfire. 07-13 model years

      Comment on this review(earn points)

      (3 of 7 customers found this review helpful)

       
      5.0

      Much better performance

      By 

      from Mattawan, Mi.

      About Me Auto Enthusiast, Casual Driver, Truck Enthusiast

      Verified Buyer
      Helpful Reviewer

      Pros

      • Improves Engine Efficiency
      • Increases Power

      Cons

        Best Uses

        • Everyday Driving
        • Performance Driving
        • Replacement

        Comments about ACDelco Professional Iridium Spark Plug:

        Last set lasted 94000 miles, but the mileage was starting to suffer. Got the new set in, and performance was like new again. Now if I can just keep from wanting to race everyone I see, it will be worth it.

        Comment on this review(earn points)

        (5 of 7 customers found this review helpful)

         
        5.0

        I would definitely buy this product again

        By 

        from PSL Florida

        About Me Auto Enthusiast, Casual Driver

        Verified Buyer
        3 or more reviews submitted

        Pros

        • Durable
        • Improves Engine Efficiency
        • Increases Power

        Cons

          Best Uses

          • Everyday Driving

          Comments about ACDelco Professional Iridium Spark Plug:

          These AC Delco professional spark plugs deliver the performance I expected !

          Comment on this review(earn points)

          (0 of 2 customers found this review helpful)

           
          5.0

          Eliminated my rough idle problem

          By 

          from PSL Florida

          About Me Casual Driver

          Verified Buyer
          3 or more reviews submitted

          Pros

          • Improves Engine Efficiency
          • Increases Power

          Cons

            Best Uses

            • Everyday Driving

            Comments about ACDelco Professional Iridium Spark Plug:

            After installing the new AC spark plugs my Tahoe ran like new !!

            Comment on this review(earn points)

            (4 of 7 customers found this review helpful)

             
            5.0

            Great plug. Just bought another set.

            By 

            from St Lucie County Fl

            About Me Casual Driver, Mechanic, Truck Enthusiast

            Ask me a question

            Verified Buyer
            Level 2

            Pros

            • Durable
            • Improves Engine Efficiency
            • Increases Power

            Cons

              Best Uses

              • Everyday Driving
              • Performance Driving
              • Replacement
              • Restoration

              Comments about ACDelco Professional Iridium Spark Plug:

              I put a set of these plugs in my 2001 Chevrolet Silverado 5.3 They improved performance and power. Never had a problem with fouling. I bought the truck new and now it has 240,000 miles and it still runs great. This is my second set. The first set lasted 80,000 miles. They were still working fine. I just replaced them because of their age. When I took them out they were still in great shape.

              Comment on this review(earn points)

              (5 of 10 customers found this review helpful)

               
              5.0

              Perfect Fit

              By 

              from Parkland, FL

              About Me Auto Enthusiast

              Verified Buyer
              Level 2

              Pros

              • Easy To Install

              Cons

                Best Uses

                • Everyday Driving
                • Replacement

                Comments about ACDelco Professional Iridium Spark Plug:

                Great replacement for original equipment.

                Comment on this review(earn points)

                (3 of 8 customers found this review helpful)

                 
                5.0

                MORE POWER

                By 

                from Middleburg, Fl.

                About Me Casual Driver, Mechanic

                Verified Buyer
                Level 2

                Pros

                • Durable
                • Easy To Install
                • Improves Engine Efficiency
                • Increases Power
                • Lightweight

                Cons

                  Best Uses

                  • Everyday Driving
                  • Replacement

                  Comments about ACDelco Professional Iridium Spark Plug:

                  Oh yea, I have a lot of break away speed. I am telling you. Replaces your spark plugs with the recommend replacement from the company. Thank you, Scottie!.

                  Comment on this review(earn points)

                  (3 of 4 customers found this review helpful)

                   
                  5.0

                  would by this product again

                  By 

                  from lake placid

                  About Me Casual Driver, Truck Enthusiast

                  Verified Buyer
                  Level 2

                  Pros

                  • Durable
                  • Easy To Install
                  • Improves Engine Efficiency

                  Cons

                    Best Uses

                    • Everyday Driving
                    • Replacement

                    Comments about ACDelco Professional Iridium Spark Plug:

                    2008 chevy Silverado z71 6.0 liter 90,000 mile's truck run's great.I thought with 90,000 mile's it was time to change the OE acdelco spark plugs. I bought the truck new in 2008 the plugs wjith 90,000 miles on them still had a gap of 0.40 and no sign of wear still like new. replaced them with the same ACdelco plugs the new plugs came already gap at 0.40 I check each plug. I would buy these plus again great plugs.

                    Comment on this review(earn points)

                    (4 of 9 customers found this review helpful)

                     
                    5.0

                    Half of dealership price!!!

                    By 

                    from Powder Springs

                    Verified Buyer
                    Level 2

                    Pros

                    • Durable
                    • Easy To Install
                    • Improves Engine Efficiency
                    • Increases Power

                    Cons

                      Best Uses

                      • Everyday Driving
                      • Replacement

                      Comments about ACDelco Professional Iridium Spark Plug:

                      Factory replacement.

                      Comment on this review(earn points)

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                      Do you have questions about this product?(earn points for answers!)

                       

                      Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                      14 Questions | 16 Answers
                      Displaying questions 1-10Previous | Next »
                      • Q:

                        Torque specs for 2009 GMC Yukon XL Denali?
                        Asked on 3/7/2015 by Brian from Spartanburg, SC

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Happy to answer your question Brian! The torque specs for these spark plugs will be 11 ft lb.

                          Answered on 3/8/2015 by Panda from AAP
                      • Q:

                        Does the construction of these acdelco iridium tipped plugs require a smaller gap than a standard plug. My 2004 gmc canyon calls for for a gap of .060 and these plugs came at .040 and are supposed to be specific to my vehicle. To gap or not to gap?
                        Asked on 1/23/2013 by Jared from Adamsville tn

                        1 answer

                        • CUSTOMER CARE

                          A:

                          For assisting you further on this ACDelco General Motors Original Equipment Iridium Spark Plug - part# 41-110, please provide the sub-model and engine size of your GMC Canyon. 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 1/23/2013 by Vincent from AAP
                      • Q:

                        i have a 1999 chevy silverado truck with a 5.3 engine. i bought these spark plugs for it. my manual says .060 and these are pre-gapped at .040. will these be alright gapped at .040? i bought them like six months ago and are just now fixing to put them in. i probaly can't take them back if they won't work.thank you
                        Asked on 12/2/2012 by Will from spartanburg s.c.

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Yes, this ACDelco General Motors Original Equipment Iridium Spark Plug - part# 41-110 is an exact fit for your 1999 Chevrolet Silverado. 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 12/3/2012 by Vincent from AAP
                      • Q:

                        how many spark plugs included in the 6.99 price?
                        Asked on 9/19/2012 by Jer

                        1 answer

                        • CUSTOMER CARE

                          A:

                          This ACDelco General Motors Original Equipment Iridium Spark Plug (Part No. 41-110) is sold individually. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

                          Answered on 9/19/2012 by Steve from AAP
                      • Q:

                        this spark plug have any warranty?
                        Asked on 9/7/2012 by mapa from chicago hieghts, ill

                        1 answer

                        • CUSTOMER CARE

                          A:

                          This ACDelco General Motors Original Equipment Iridium Spark Plug (Part No. 41-110) comes with 3 year replacement warranty if defective. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

                          Answered on 9/8/2012 by Steve from AAP
                      • Q:

                        I have a 2002 Yukon XL Spark plug 41-110 are they to be regap to 0.60 or leave them at 0.40
                        Asked on 7/14/2012 by RJ

                        1 answer

                        • CUSTOMER CARE

                          A:

                          This ACDelco General Motors Original Equipment Iridium Spark Plug –part# 41-110 comes pre-gapped at 0.040" and is an exact fit for your 2002 GMC Yukon XL. It is not necessary to re-gap it to 0.60. 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 representative there would be more than happy to assist you.

                          Answered on 7/14/2012 by Vincent from AAP
                      • Q:

                        What is the thread size in mm for this plug?

                        thanks
                        Asked on 6/26/2012 by mike

                        1 answer

                        • CUSTOMER CARE

                          A:

                          The spark plug thread size of this ACDelco General Motors Original Equipment Iridium Spark Plug (Part# 41-110) is 14mm. 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 6/27/2012 by Ralph from AAP
                      • Q:

                        What is the recommended gap for these plugs and my vehicle?
                        Asked on 6/13/2012 by Dan from Naples, FL

                        2 answers

                        • CUSTOMER CARE

                          A:

                          This ACDelco General Motors Original Equipment Iridium Spark Plug Part number 41-110 is pre-gapped at 0.040. To know the exact fit application, please provide the year, make, model and engine size of the vehicle and we would be better able to assist you.

                          Answered on 6/16/2012 by Steve from AAP
                        • CUSTOMER CARE

                          A:

                          This ACDelco General Motors Original Equipment Iridium Spark Plug (Part# 41-110) is pre-gapped at 0.040in. In order to assist you further, please provide your vehicle make, model and engine specification.

                          Answered on 6/16/2012 by Dennis from AAP
                      • Q:

                        Would I need to gap these for a 2002 GMC Yukon 4.8L or do they come pre-gapped?
                        Asked on 3/19/2012 by Anonymous from US

                        2 answers

                        • CUSTOMER CARE

                          A:

                          Yes, this ACDelco General Motors Original Equipment Iridium Spark Plug with part# 41-110 fits your 2002 GMC Yukon and it comes pre-gapped at 0.040".

                          Answered on 3/20/2012 by Vincent from AAP
                        • CUSTOMER CARE

                          A:

                          Yes, this ACDelco General Motors Original Equipment Iridium Spark Plug Part number 41-110 is pre-gapped at 0.040.

                          Answered on 3/20/2012 by Steve from AAP
                      • Q:

                        Just ordered these plugs and I was wondering if they're set at .040, .060, or another gap. I recently read a GM service announcement that states iridium plugs for my 2000 GMC Sierra should be gaped at .060 and others to the regular .040. If my plugs come incorrectly gaped should I attempt to re-gap them, or switch out the awry plug(s) at my local retailer?
                        Asked on 1/1/2012 by Brambo from Pennsylvania

                        1 answer

                        • CUSTOMER CARE

                          A:

                          This ACDelco General Motors Original Equipment Iridium Spark Plug is a 0.040 Gap Iridium spark plug. As per AcDelco this is an ideal plug for the 2000 GMC Sierra vehicle. Or else provide the exact model(within Sierra), and engine size of your application and we will have this checked further.

                          Answered on 1/3/2012 by John the Car-Doc from AAP
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