Hi-Performance Racing Spark Plug
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Autolite Hi-Performance Racing Spark Plug

Part No. AR3924 Warranty Details  

Fit of this part varies by vehicle & equipment specs Type of Fit

Actual racing spark plug used by many professional race car drivers. Provides a new Yttrium enhanced alloy allowing up to 8% reduction in sidewire temperature*, anti-corrosive nickel plating and cut back ground electrode for improved ignitability.
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Electrode Tip Material:Resistor
Reach:3/4 in
Resistor:Suppressor
Seat Type:Gasket
Thread Diameter:14 mm
Tip Configuration:Power
Wrench Diameter:5/8 in

REVIEW SNAPSHOT®

by PowerReviews
AutoliteHi-Performance Racing Spark Plug
 
4.0

(based on 3 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

Reviewed by 3 customers

Displaying reviews 1-3

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5.0

Auto lite plugs

By 

from Sandston,Va

About Me Competitive Driver, Mechanic

Verified Buyer

Pros

  • Durable
  • Easy To Install

Cons

    Best Uses

    • Performance Driving
    • Racing

    Comments about Autolite Hi-Performance Racing Spark Plug:

    I have been using auto lite plugs all my life in my personal truck and car down to my street rod

    (23 of 38 customers found this review helpful)

     
    4.0

    Best spark plug

    By 

    from West Palm Beach, Fl

    About Me Casual Driver

    See all my reviews

    Verified Buyer
    3 or more reviews submitted

    Pros

    • Easy To Install

    Cons

      Best Uses

      • Replacement

      Comments about Autolite Hi-Performance Racing Spark Plug:

      PLACEMENT PART FOR TUNE UP

      (37 of 75 customers found this review helpful)

       
      3.0

      see comments

      By 

      from houston, tx

      Verified Buyer
      Helpful Reviewer

      Comments about Autolite Hi-Performance Racing Spark Plug:

      I was sent 6 of these plugs, and 2 Bosch Spark plugs. I don't know why this happened, but I ordered 8 Autolites, and should have received 8 of them, not 6 and then 2 random Spark plugs that I didn't want. Shipping dept screwed this up.

      Displaying reviews 1-3

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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.

      4 Questions | 5 Answers
      Displaying questions 1-4
      • Q:

        would these hi performance spark plugs be ok to use in my 97 Nissan hardbody 4 cylinder 2.2 ka24 I rebuilt it its got 30,000 mile since rebuild and just put new timing chain and head gasket less than 2,000 mile ago would like to increase power its stock at moment
        Asked on 11/14/2016 by speedy the mechanic from gainesboro,TN

        1 answer

        • CUSTOMER CARE

          A:

          Hi Mechanic, glad to assist you! Autolite Copper Spark Plugs is guaranteed to deliver quick starts, good fuel economy and smooth acceleration. Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof). Multi-rib insulator reduces danger of "flash-over". One-piece terminal post adds strength. Resistor reduces radio frequency interference (RFI) and electrode erosion. Cold-formed steel shell precision rolled threads. Full copper core electrode provides better performance in all conditions. For more information, please copy and paste this link. URL - http://www.autolite.com/Productfinder/Resources/TechNotes/3415RacingHPFacts_040114.pdf

          Answered on 11/19/2016 by Steve from AAP
      • Q:

        whats the gap plug #3924 -383 stroker 194 alumin. heads
        Asked on 10/18/2014 by taz from hahnville louisiana

        1 answer

        • CUSTOMER CARE

          A:

          I'm happy to help, Taz! These Autolite Racing Copper Core Non-Resistor Spark Plugs (Part No. AR3924) do not include gap specifications for modified engines. I do have the specifications for the 1990-1992 Chevrolet Corvette 5.7L V8 VIN: J and 1991-1992 Corvette 5.7L V8 VIN: 8. These plugs are specified to be gapped at 0.035. For the appropriate gap for your engine I suggest speaking with your mechanic or engine builder. You can also find a mechanic using our 'Need expert help?' link further down this page.

          Here is a link to the application chart for racing spark plugs: http://www.autolite.com/media/11805/autolite_hp_apps_0.pdf

          Answered on 11/3/2014 by Heath, ASE Parts Specialist from AAP
      • Q:

        what size plug wrench for 2005 ford f-150 5.4
        Asked on 8/3/2013 by gene

        1 answer

        • CUSTOMER CARE

          A:

          With reference to your inquiry on the Autolite Racing Copper Core Non-Resistor Spark Plug - part# AR3924, you would need 9/16" Spark plug socket for your 2005 Ford F150 5.4L. For any further assistance, you may also 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 8/4/2013 by Vincent from AAP
      • Q:

        what is the gap for Autolite AR3924 with HIE distrib. 454 cu in with 396 oem cast iron heads
        Asked on 5/12/2011 by Big Lou from New Braunfels, Texas

        2 answers

        • CUSTOMER CARE

          A:

          In order to best answer your question, our technicians would be more than happy to assist you if you could please call us at -877-ADVANCE (238-2623).

          Answered on 7/5/2011 by Steve from AAP
        • A:

          42 in

          Answered on 9/21/2011 by badboy100000 from portsmouth,ohio
      Displaying questions 1-4

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