Professional Iridium Spark Plug
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ACDelco Professional Iridium Spark Plug

Part No. 41-993 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.

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
Resistor:Yes
Seat Type:Tapered
Thread Diameter:14 mm

REVIEW SNAPSHOT®

by PowerReviews
ACDelcoProfessional Iridium Spark Plug
 
4.7

(based on 41 reviews)

Ratings Distribution

  • 5 Stars

     

    (33)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

97%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (24)
  • Increases power (23)
  • Easy to install (22)
  • Durable (20)
  • Lightweight (6)

Cons

No Cons

Best Uses

  • Everyday driving (30)
  • Replacement (23)
  • Restoration (7)
  • Performance driving (6)
    • Car & Truck:
    • Auto enthusiast (3), Casual driver (3), Truck enthusiast (3)
    • Was this a gift?:
    • No (3)
    • Reviewer Profile:
    • Casual driver (21), Auto enthusiast (10), Truck enthusiast (7), Mechanic (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 41 customers

Displaying reviews 1-10

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5.0

Real nice spark plugs

By 

from Moab,ut

Verified Buyer

Comments about ACDelco Professional Iridium Spark Plug:

Great oem plugs,on my v6 4.3 vortec the middle drivers side plug is hard to get out,because the steering shaft is in the way,you have to use a swivel socket,and go trough the wheel well,but otherwise easy installation,great quality ac-delco product,my truck runs smooth as silk

  • Was this a gift?:
  • No
 
5.0

Top of the line

By 

from Monroe, GA

Verified Buyer

Comments about ACDelco Professional Iridium Spark Plug:

A mechanic told me to go iridium! 100,000 mile plugs I just installed in my 98 GMC Sierra with 352,000 miles!

  • Was this a gift?:
  • No
 
4.0

Very good product

By 

from Waterloo iowa

Verified Buyer

Comments about ACDelco Professional Iridium Spark Plug:

Very easy to use pre gapped

  • Was this a gift?:
  • No
 
4.0

I would buy again

By 

from San Antonio, TX

Verified Buyer

Comments about ACDelco Professional Iridium Spark Plug:

Great birthday gift

  • Was this a gift?:
  • Yes
 
5.0

Great plugs

By 

from Providence, RI

Verified Buyer

Comments about ACDelco Professional Iridium Spark Plug:

Great factory replacement on my S-10 pickup. Gaps were fine and truck runs smooth.

 
5.0

One of the best

By 

from Tyler,Tx

Verified Buyer

Comments about ACDelco Professional Iridium Spark Plug:

An Iridium plug outlasts any regular spark plug .

  • Was this a gift?:
  • Yes
 
5.0

2000 blazer

By 

from Parkville, MD

About Me Casual Driver

Verified Buyer

Pros

  • Durable

Cons

  • No Improvement In Performance

Best Uses

  • Everyday Driving

Comments about ACDelco Professional Iridium Spark Plug:

had to be done 130,000 miles

 
5.0

Great product so far

By 

from Flowery Branch, GA

About Me Auto 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 ACDelco Professional Iridium Spark Plug:

    Great product. Please check your parts before you leave the store. Advance shorted me two plugs. Should have had 8 total but when I arrived home only had 6. Had to send my son back to pick up the remaining two. 14 miles round trip.

    (1 of 1 customers found this review helpful)

     
    4.0

    Great ACDelco Plugs but watch your gaps!

    By 

    from New Jersey

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

    Pros

      Cons

        Best Uses

        • Everyday Driving
        • Replacement
        • Restoration

        Comments about ACDelco Professional Iridium Spark Plug:

        These are great plugs. ACDelco and Chevy, you can't go wrong. The only goof is Iridium-tipped plugs for most Chevy's should now be gapped to roughly 0.040, not the 0.060 these come from the factory as. Look around on the Chevy forums and you'll find this out quickly. I put them in as I got them, 0.060 gap, and my truck ran just a little rough. I checked around and found out about the new gap setting. Once I regapped them to 0.040 my truck runs like new. Don't forget the dielectric grease on the inside of the boot and you'll be good to go!

        (1 of 1 customers found this review helpful)

         
        4.0

        ACDelco iridium

        By 

        from Ar

        About Me Casual Driver

        See all my reviews

        3 or more reviews submitted

        Pros

        • Durable
        • Easy To Install
        • Increases Power

        Cons

          Best Uses

          • Everyday Driving
          • Replacement
          • Restoration

          Comments about ACDelco Professional Iridium Spark Plug:

          i am finding out the hardway FAST that plugs do make a difference if you have a misfire condition, while putting a 2000 escalade back together i used a cheaper brand to save money and climbing hills it kept throwing a p0307 misfire condition, after switching to these (what it was supposed to have to begin with) the misfire on 7 went away.

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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.

          16 Questions | 22 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

            2 answers

            • A:

              $6.95 is for one plug

              Answered on 6/2/2016 by Bobby from Des Plaines, IL
            • 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 »

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