Professional Iridium Spark Plug
Hover over the image to zoom in
Share this:

ACDelco Professional Iridium Spark Plug

Part No. 41-993 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

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.
Back To Top
Electrode Core Material:Copper
Resistor:Yes
Spark Plug Seat Type:Tapered
Spark Plug Thread Size:14

REVIEW SNAPSHOT®

by PowerReviews
ACDelcoProfessional Double Platinum Spark Plug
 
4.8

(based on 30 reviews)

Ratings Distribution

  • 5 Stars

     

    (26)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

96%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (23)
  • Easy to install (20)
  • Increases power (20)
  • Durable (18)
  • Lightweight (6)

Cons

No Cons

Best Uses

  • Everyday driving (25)
  • Replacement (20)
  • Performance driving (6)
  • Restoration (5)
    • Car & Truck:
    • Auto enthusiast (3), Casual driver (3), Truck enthusiast (3)
    • Reviewer Profile:
    • Casual driver (17), Auto enthusiast (8), Mechanic (6), Truck enthusiast (6)

Most Liked Positive Review

 

AC Delco spark plugs

This is the OEM replacement for my 1998 GMC Jimmy (and all the GM Vortec V6's out there). The original plugs were still running smoothly after 152,000 miles but the gas milage...Read complete review

This is the OEM replacement for my 1998 GMC Jimmy (and all the GM Vortec V6's out there). The original plugs were still running smoothly after 152,000 miles but the gas milage was dropping. You can't beat that kind of dependability or quality so why even look for an aftermarket plug. They have changed the design and part number from 41-992 (my old ones) to 41-993. These newer plugs have a tiny spark wire extending off of the center electrode instead of the flat rod. I guess this functions like a "lightning rod" and makes the spark more "focused".

NOTE: these are the Professional Platinum plugs; HOWEVER, the box is marked Iridium. Theses are not suposed to be Iridium plugs and are pre-gapped just like a platinum plug should be (around 0.06 on the 41-993). Maybe someone can add a comment if they know something. Yes its the correct box, both the boxes and the plugs indicate 41-993. Whats up with that ?

Installing a spark-plug is not hard, in principle, (loosen, remove, insert, tighten) but plugs on the Jimmy (Blazer or Bravada) are not a simple job because of their locations. Once you learn all the tricks its actually not so bad (except #3 plug, even after you know what to do its 10 minutes by itself). Yes these plugs cost a bit more (at list price) than some of the others but these are the plugs you want in your GM engine to get the optimum performance and longevity (unless you plan on re-engineering the entire ignition system with after-market performance parts). Use a coupon code at Advance Auto and you can get 40% off! Or just spend a couple of bucks now and be done with it, you don't want to do this plug change often. Unless you plan on modifing the entire ignition system just stick with what was designed for your motor. If these plugs run as well as the originals, they will outlast my ownership of the Jimmy (or me).

I have seen the mpg increase to the level I originally had when I bought the Jimmy (23.5 mpg highway). With the old plugs, it had slowly been dropping off over the last 30,000 down to about 20.7 mpg. I should have done this job 3 years ago.

VS

Most Liked Negative Review

 

one bad out of 6

out of 6 plugs had one with bad threads caused a skip and it would be the one hardest to reach.

out of 6 plugs had one with bad threads caused a skip and it would be the one hardest to reach.

Reviewed by 30 customers

Sort by

Displaying reviews 1-10

Back to top

Previous | Next »

(3 of 4 customers found this review helpful)

 
5.0

Oem Plugs only way to go

By 

from Jackson, Ohio

About Me Mechanic

Verified Buyer
Helpful Reviewer

Pros

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

Cons

    Best Uses

    • Everyday Driving
    • Replacement
    • Restoration

    Comments about ACDelco Professional Double Platinum Spark Plug:

    Putting OEM spark plugs in is the same as was new from the factory.

    Comment on this review(earn points)

    (2 of 4 customers found this review helpful)

     
    5.0

    Good product. Car running great! No mo

    By 

    from Rootstown, ohio

    About Me Casual Driver

    Verified Buyer
    Level 1

    Pros

    • Durable
    • Easy To Install

    Cons

      Best Uses

      • Everyday Driving
      • Replacement

      Comments about ACDelco Professional Double Platinum Spark Plug:

      Fairly easy to install. Spec right on. I would buy these spark plugs again. So far so good.

      Comment on this review(earn points)

      (1 of 1 customers found this review helpful)

       
      5.0

      Best spark plug to use in a vortec motor

      By 

      from Lakeland

      About Me Auto Enthusiast, Casual Driver, Mechanic, Truck Enthusiast

      Ask me a question

      Level 6

      Pros

      • Durable
      • Improves Engine Efficiency
      • Increases Power
      • Oem Plug
      • Pre gapped

      Cons

      • A bit pricey

      Best Uses

      • Everyday Driving
      • Replacement
      • Restoration

      Comments about ACDelco Professional Double Platinum Spark Plug:

      I purchased a set of these spark plugs for my 2005 Chevy Silverado 4.3 Vortec V6. AC Delco spark plugs are installed at the factory for GM trucks so I decided to stick with AC Delco. These came pre gapped for my application and are MUCH better than other brands available. Do yourself a favor if you own a GM vehicle, especially a Vortec V6 or V8 engine and use these plugs.

      Comment on this review(earn points)

      (0 of 2 customers found this review helpful)

       
      5.0

      Great, high quality plugs

      By 

      from Nebraska

      About Me Auto Enthusiast, Casual Driver, Mechanic

      Verified Buyer
      Level 2

      Pros

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

      Cons

        Best Uses

        • Everyday Driving
        • Replacement

        Comments about ACDelco Professional Double Platinum Spark Plug:

        These are excellent quality replacement plugs for my 2005 Silverado 4.3. Gapped correctly right out of the box (I always check to be sure).

        Comment on this review(earn points)

        (2 of 2 customers found this review helpful)

         
        2.0

        one bad out of 6

        By 

        from winston salem nc

        About Me Casual Driver

        Verified Buyer
        Level 3

        Pros

          Cons

            Best Uses

            • Everyday Driving

            Comments about ACDelco Professional Double Platinum Spark Plug:

            out of 6 plugs had one with bad threads caused a skip and it would be the one hardest to reach.

            Comment on this review(earn points)

            (0 of 2 customers found this review helpful)

             
            5.0

            A-1 PLUGS

            By 

            from STOCKBRIGE GA.

            About Me Casual Driver

            Verified Buyer
            3 or more reviews submitted

            Pros

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

            Cons

              Best Uses

              • Everyday Driving

              Comments about ACDelco Professional Double Platinum Spark Plug:

              BEST PLUGS

              Comment on this review(earn points)

              (2 of 4 customers found this review helpful)

               
              5.0

              great product

              By 

              from Chicago, Il

              About Me Casual Driver

              Verified Buyer
              Level 3

              Pros

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

              Cons

                Best Uses

                • Everyday Driving

                Comments about ACDelco Professional Double Platinum Spark Plug:

                When I installed this spark plugs on my suburban immediately felt the difference more powerful and smooth driving I hope these lasts long

                Comment on this review(earn points)

                (14 of 29 customers found this review helpful)

                 
                5.0

                Works great

                By 

                from La.

                About Me Casual Driver

                Verified Buyer
                Level 2

                Pros

                • Improves Engine Efficiency
                • Increases Power

                Cons

                  Best Uses

                  • Replacement

                  Comments about ACDelco Professional Double Platinum Spark Plug:

                  Replaced plugs in my boat,now it runs great.

                  Comment on this review(earn points)

                  (17 of 34 customers found this review helpful)

                   
                  5.0

                  Spend the extra money for these plugs!

                  By 

                  from Atlanta, GA

                  About Me Auto Enthusiast

                  Verified Buyer
                  3 or more reviews submitted

                  Pros

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

                  Cons

                    Best Uses

                    • Everyday Driving
                    • Replacement

                    Comments about ACDelco Professional Double Platinum Spark Plug:

                    Expensive, but worth it and should return ROI in fuel cost

                    Comment on this review(earn points)

                    (19 of 38 customers found this review helpful)

                     
                    4.0

                    great plug for my gm

                    By 

                    from fl

                    About Me Truck Enthusiast

                    Verified Buyer
                    Level 3

                    Pros

                    • Improves Engine Efficiency

                    Cons

                      Best Uses

                      • Everyday Driving
                      • Replacement

                      Comments about ACDelco Professional Double Platinum Spark Plug:

                      works great in my 4.3 sonoma

                      Comment on this review(earn points)

                      Displaying reviews 1-10

                      Back to top

                      Previous | Next »

                      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.

                      16 Questions | 21 Answers
                      Displaying questions 1-10Previous | Next »
                      • Q:

                        What Autolite Iridium XP plug is compatible to the AC 41-993?
                        Asked on 3/23/2015 by Bate from Hampton, Va

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Bate, I'm glad to assist you! This ACDelco Professional Iridium Spark Plug - Part No. 41-993 crosses the Autolite Double Platinum Spark Plug - Part No. APP605. Generally, the platinum spark plug crosses the other platinum plug, not iridium.

                          Answered on 3/24/2015 by Solomon
                      • Q:

                        Can I use these plugs on an Chevy impala 2005
                        Asked on 12/12/2014 by Snoopy from Jacksonville FL

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Snoopy! To check compatibility, please provide the sub-model and engine size of Chevy impala 2005.

                          Answered on 12/12/2014 by Solomon
                      • Q:

                        On spark plugs does higher heat range mean a hotter spark?
                        Asked on 11/7/2014 by Old Steve from Ohio

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi Old Steve, glad to assist you! The heat range of a spark plug is indicated within the manufacturer's part number for each plug. Also the dimension and specification will help us to find the difference between the hot and cold spark plugs. For example please visit this link. URL - http://www.ngksparkplugs.com/pdf/DYK_HeatRanges.pdf

                          Answered on 11/8/2014 by Steve from AAP
                      • Q:

                        iam looking for the performance spark plug for my Chevrolet suburban c1500
                        Asked on 12/23/2013 by bojack from cairo ga

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Hi bojack, glad to assist you! To locate the exact performance spark plug, please provide us the year, and engine size of your vehicle.

                          Answered on 12/24/2013 by Steve from AAP
                      • Q:

                        rebate on 41993 spark plugs
                        Asked on 2/15/2013 by fast

                        1 answer

                        • CUSTOMER CARE

                          A:

                          With reference to the ACDelco Spark Plug (Part No. 41-993), for more information about your rebate you may visit our rebate website at https://advanceautoparts.4myrebate.com/. This website will provide you with the status of your rebate, find rebate forms, and how to contact our rebate customer service center. 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 2/16/2013 by Steve from AAP
                      • Q:

                        I have a 02 S-10 ZR2 pkg with a 4.3L. will these plugs fit? The # I have is 41-948 or has the # changed? I want the right plugs in my vehicle.I don't want to have any problems or and ses light.
                        Asked on 12/25/2012 by Lt from Norwood Mass

                        1 answer

                        • CUSTOMER CARE

                          A:

                          This ACDelco Spark Plug (Part No. 41-993) is an exact fit for your 2002 Chevrolet S10 @GAP .060. 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 12/25/2012 by Steve from AAP
                      • Q:

                        Is this price for one plug or all six in one pack?
                        Asked on 4/15/2012 by DiGar from Elizabethtown, KY

                        3 answers

                        • A:

                          That' per plug my friend!

                          Answered on 7/3/2012 by Larry from Candler, NC
                        • CUSTOMER CARE

                          A:

                          This part ACDelco Spark Plug, Part No. 41-993 manufactured by ACDelco is sold individually.
                          For compatibility of this part with your vehicle, please provide your vehicle make, model and engine specification.

                          Answered on 4/16/2012 by Aaron from AAP
                        • A:

                          most spark plugs are priced per plug. more expensive plugs are higher quality, ie. iridium

                          Answered on 8/3/2012 by fil from c-bus ohio
                      • Q:

                        for 6.95 i highly doubt that this is just one plug how many am i getting for this price?
                        Asked on 3/31/2012 by Stephen the mechanic from Millville NJ

                        1 answer

                        • CUSTOMER CARE

                          A:

                          This part ACDelco Spark Plug, Part No. 41-993 manufactured by ACDelco is sold individually.
                          For compatibility of this part with your vehicle, please provide your vehicle make, model and engine specification.

                          Answered on 4/1/2012 by Aaron from AAP
                      • Q:

                        are these plugs nickle plated
                        Asked on 2/13/2012 by mickey from tazewell va

                        1 answer

                        • CUSTOMER CARE

                          A:

                          This ACDelco Spark Plug with part# 41-993 is an Original Equipment (OE) supplier. This has dual platinum tip for improved resistance to spark erosion and corrosive combustion chamber environment.

                          Answered on 2/14/2012 by Vincent from AAP
                      • Q:

                        chev 79 c-10 5.7 engine, ac plugs part no#41-993 platinum.what is the correct plug gap. is it 45 or 60? 35-gap is for the older plugs like 44RT.
                        Asked on 11/14/2011 by Anonymous from middletown,va

                        1 answer

                        • CUSTOMER CARE

                          A:

                          Initial suggested settings for spark plug gaps are: Single plug: 0.028 - 0.032", Dual plug: 0.025 - 0.030".

                          Answered on 11/14/2011 by Steve from AAP
                      Displaying questions 1-10Previous | Next »

                      Do you have a question about this product? 

                      Create or view your online garage

                      Check out the specials in our monthly flyer

                       
                       
                      Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.