Professional Iridium Spark Plug
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ACDelco Professional Iridium Spark Plug

Part No. 41-101 Warranty  

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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.

Product Features:

  • The kind of firepower you expect from ACDelco. The spark plug is what started it all for us, and with over 100 years of innovation behind each spark plug, you know they're going to be great. From the old to the new and even the non-automotive, ACDelco has a spark plug to fit just about whatever your need may be.
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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 38 reviews)

Ratings Distribution

  • 5 Stars

     

    (32)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

97%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (31)
  • Increases power (22)
  • Durable (20)
  • Easy to install (20)
  • Lightweight (4)

Cons

    Best Uses

    • Everyday driving (25)
    • Replacement (25)
    • Performance driving (10)
    • Restoration (6)
    • Racing (5)
      • Car & Truck:
      • Casual driver (10), Auto enthusiast (8), Mechanic (5), Truck enthusiast (3)
      • Reviewer Profile:
      • Casual driver (13), Auto enthusiast (12), Mechanic (8)

    Most Liked Positive Review

     

    Last spark plugs I'll need to buy

    These are the stock plugs in my '04 Grand Prix. They claim to last 100,000 miles, and they deliver on that promise. After 111,000 miles I decided I should place these before they...Read complete review

    These are the stock plugs in my '04 Grand Prix. They claim to last 100,000 miles, and they deliver on that promise. After 111,000 miles I decided I should place these before they caused problems. As I pulled out the old plugs I checked each and every one of them. The gap was still perfect, and they hardly looked used at all. I almost put the old plugs back in thinking I could return these, but I realized that this is probably the last time I'll change plugs on this car. Based on the condition of the old plugs, I would give these the highest recommendation. The 3800 motor is known for destroying lessor plugs, but these babies looked like they barely had a few thousand miles on them.

    VS

    Most Liked Negative Review

     

    after market wooe's

    the original iridium ac plugs lasted 100,000 miles like they should I replaced with advanced ac iridium replacements and had 2 foul out of course it took me months and lots of parts to figure...Read complete review

    the original iridium ac plugs lasted 100,000 miles like they should I replaced with advanced ac iridium replacements and had 2 foul out of course it took me months and lots of parts to figure it was the new plugs causing a high end mis-fire, replaced 2 that were bad and now another cylinder mis-firing a plug gone bad I'm sure, why aftermarket original parts don't last?

    Reviewed by 38 customers

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    Displaying reviews 1-10

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    1.0

    after market wooe's

    By super fast

    from morgantown,wv

    About Me Auto Enthusiast

    Pros

    • Improves Engine Efficiency

    Cons

      Best Uses

        Comments about ACDelco Professional Iridium Spark Plug:

        the original iridium ac plugs lasted 100,000 miles like they should I replaced with advanced ac iridium replacements and had 2 foul out of course it took me months and lots of parts to figure it was the new plugs causing a high end mis-fire, replaced 2 that were bad and now another cylinder mis-firing a plug gone bad I'm sure, why aftermarket original parts don't last?

        Comment on this review(earn points)

        (1 of 1 customers found this review helpful)

         
        5.0

        Good plugs

        By Greg

        from Dayton, Ohio

        About Me Auto Enthusiast

        Verified Buyer
        Level 3

        Pros

        • Easy To Install
        • Improves Engine Efficiency

        Cons

          Best Uses

            Comments about ACDelco Professional Iridium Spark Plug:

            These plugs worked just fine in my 1999 Park Ave. They should last 100k in this application. Very similar to the original plugs. As with any spark plug time will tell.

            Comment on this review(earn points)

            (1 of 1 customers found this review helpful)

             
            5.0

            Great OE replacement

            By lex

            from Tri Cities,tn

            About Me Auto Enthusiast, Casual Driver

            Pros

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

            Cons

              Best Uses

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

              Comments about ACDelco Professional Iridium Spark Plug:

              Best to go with OE iridium by AC Delco! Original plugs looked pretty good for having 113k on them and after replacement instant improvement in MPG they also have 3 yr replacement warranty!

              Comment on this review(earn points)

              (1 of 1 customers found this review helpful)

               
              5.0

              The Only Plug to Use on a Chevy Equinox

              By Tom

              from Oswego, IL

              About Me Auto Enthusiast, Competitive Driver, Mechanic

              Ask me a question

              3 or more reviews submitted

              Pros

              • Improves Engine Efficiency
              • Increases Power

              Cons

              • none

              Best Uses

              • Chevy Equinox
              • Replacement

              Comments about ACDelco Professional Iridium Spark Plug:

              Own 2005 Chevy Equinox. The Equinox runs better with high quality plugs and wires. I know because there are known problems with OEM plug wires which will electricly breakdown, with as little as 50k miles. This will fool the engine's on-board ECM. Performance will drop, the engine/trans will seem to bog down and/or buck. It seemed like a new engine and trans with new quality wires & plugs. There was a totaly noticable difference of improvement. Stick with the high quality stuff on this Nox!

              Comment on this review(earn points)

              (1 of 1 customers found this review helpful)

               
              5.0

              AC Spark Plug

              By Mick

              from Land O Lakes, FL

              About Me Auto Enthusiast

              Verified Buyer
              Level 2

              Pros

              • Improves Engine Efficiency

              Cons

                Best Uses

                • Replacement

                Comments about ACDelco Professional Iridium Spark Plug:

                Direct replacement. Replaced the origninal set that had 120k miles on them. Immediate increase in gas milage.

                Comment on this review(earn points)

                (5 of 9 customers found this review helpful)

                 
                5.0

                Worked great. No problems

                By lazscrappy

                from Watertown, ct

                About Me Mechanic

                Verified Buyer
                Helpful Reviewer

                Pros

                  Cons

                    Best Uses

                      Comments about ACDelco Professional Iridium Spark Plug:

                      Worked great. No gap needed.

                      Comment on this review(earn points)

                      (4 of 8 customers found this review helpful)

                       
                      5.0

                      AC plugs

                      By Steve

                      from Austin, Ark

                      About Me Auto Enthusiast

                      Verified Buyer
                      Level 2

                      Pros

                      • Durable
                      • Improves Engine Efficiency
                      • Increases Power

                      Cons

                        Best Uses

                        • Everyday Driving
                        • Replacement

                        Comments about ACDelco Professional Iridium Spark Plug:

                        Great log lasting plugs

                        Comment on this review(earn points)

                        (5 of 9 customers found this review helpful)

                         
                        5.0

                        AC Delco Pro Iridium

                        By God_Splitter

                        from Colorado Springs, CO

                        About Me Casual Driver

                        Level 3

                        Pros

                        • Easy To Install
                        • Increases Power

                        Cons

                          Best Uses

                          • Everyday Driving
                          • Replacement

                          Comments about ACDelco Professional Iridium Spark Plug:

                          I recently purchased the AC Delco Pro Iridium spark plugs (Part No. 41-101) for my new to me 2005 Chevrolet Equinox with 97000 miles. The OEM plugs were the exact same and upon removing them I noticed that they still had plenty of life left in them despite manufacturers recommendations of 100000 miles. The old plugs came out easily and the new ones went in easy. I noticed a generous increase in power afterwards.

                          Combine the already decent price with a manufacturers rebate of $2.00 per plug and that is an excellent deal!!

                          Comment on this review(earn points)

                          (4 of 8 customers found this review helpful)

                           
                          4.0

                          routine maintence

                          By Jackie

                          from Clarion, Pa

                          About Me Casual Driver, Commuter

                          Verified Buyer
                          Level 3

                          Pros

                          • Easy To Install

                          Cons

                            Best Uses

                            • Everyday Driving

                            Comments about ACDelco Professional Iridium Spark Plug:

                            routine maintence

                            Comment on this review(earn points)

                            (4 of 8 customers found this review helpful)

                             
                            4.0

                            Great for GM cars OEM equipment

                            By Mike

                            from Atlanta,Ga

                            About Me Auto Enthusiast, Casual Driver

                            Verified Buyer
                            Helpful Reviewer

                            Pros

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

                            Cons

                              Best Uses

                              • Everyday Driving
                              • Replacement

                              Comments about ACDelco Professional Iridium Spark Plug:

                              Great replacement part with OEM specs

                              Comment on this review(earn points)

                              Displaying reviews 1-10

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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.

                              8 Questions | 12 Answers
                              Displaying questions 1-8
                              • Q:

                                does this replace ACDelco 41-940 Professional Platinum Spark Plugs for my 2000 chevy Malibu gm 3.1L engine
                                Asked on 3/4/2014 by Julian from Union, NJ

                                1 answer

                              • Q:

                                I thought this plug or product came gapped ready to go
                                Asked on 2/2/2013 by Bob from C.L., IL 60014

                                1 answer

                                • CUSTOMER CARE

                                  A:

                                  A spark plug part number might fit hundreds of different engines from many different manufacturers. Although the spark plug from the factory will come with a gap to a pre-selected setting, this may not be the right gap for your particular engine. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy, and accelerated plug wear. It is always best to check the gap against the manufacturer's specifications. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap should be adjusted by only moving the ground electrode.
                                  For compatibility of this part with your vehicle, please provide your vehicle make, model and engine specification.
                                  For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

                                  Answered on 2/2/2013 by Aaron from AAP
                              • Q:

                                does ac 41-101 replace ac 41-933 2000 buick lasabre
                                Asked on 11/1/2012 by painterpete from norwood ny

                                1 answer

                                • CUSTOMER CARE

                                  A:

                                  This ACDelco Spark Plug (Part No. 41-101) is an exact fit for your 2000 Buick LeSabre. 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 11/1/2012 by Steve from AAP
                              • Q:

                                does this replace 41-933
                                Asked on 10/31/2012 by painterpete from norwood ny

                                1 answer

                                • CUSTOMER CARE

                                  A:

                                  For further assistance regarding ACDelco Spark Plug - Part No. 41-101, please provide the year, make, model and engine size of your vehicle. This information would help us to assist you in a better way.
                                  For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

                                  Answered on 10/31/2012 by Aaron from AAP
                              • Q:

                                do I use lubricant on the plug threads on installation Thanks Hderb
                                Asked on 9/10/2012 by herb from Shelton Ct .06484

                                2 answers

                                • A:

                                  If you have aluminum heads,yes use antiseeze on threads,if you have cast iron heads put plugs in dry.Be careful not to over tighten them.Hope this helps, Jason.

                                  Answered on 6/16/2014 by Jayrod from Wilmington, NC.
                                • CUSTOMER CARE

                                  A:

                                  No, it is not recommended to use anti-seize on spark plugs period and on Aluminum heads to boot. It may cause fouling, misfire, etc. 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 9/10/2012 by Vincent from AAP
                              • Q:

                                what is an iridium plug?
                                Asked on 10/10/2011 by Anonymous

                                1 answer

                                • CUSTOMER CARE

                                  A:

                                  Iridium spark plug is employed with high corrosion resistance at high temperatures is needed and it crucibles for recrystallization of semiconductors at high temperatures.

                                  Answered on 10/11/2011 by Dennis from AAP
                              • Q:

                                what is the gap? how wide can the gap be before plug doesn't work?
                                Asked on 1/29/2011 by Anonymous

                                3 answers

                                • A:

                                  Here is half your answer.
                                  Spark Plug Gap 1.52 mm (0.060 in)

                                  Answered on 3/14/2011 by Shump from Leesburg VA
                                • A:

                                  0.060in

                                  Answered on 6/25/2011 by El mechanico cmcsev from Denver CO
                                • A:

                                  0.80 thousands

                                  Answered on 9/25/2011 by Terminator from Beaufort, S. Carolina
                              • Q:

                                how many spark plugs come with 1 order
                                Asked on 11/11/2010 by frito bandito from bay city

                                2 answers

                                • CUSTOMER CARE

                                  A:

                                  these are sold individually

                                  Answered on 11/15/2010 by Krystal from AAP
                                • A:

                                  One.

                                  Answered on 12/1/2010 by buzzturk from SF
                              Displaying questions 1-8

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