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Product Information

Product Details
Part No. AR3932X
Warranty Details (2 YR REPLACEMENT IF DEFECTIVE)
A surface gap plug provides exactly what its name describes - a gap at the surface of the combustion chamber. The gap is an annular configuration. The center electrode and insulator tip operate extremely cold (no heat rating) and are therefore nearly impervious to pre-ignition. Power tip X does not use a side ground electrode, eliminating the need for indexing of the spark plug and any gap setting adjustments. This innovative design also reduces the volume of the combustion chamber, increasing the Compression Ratio for enhanced performance. While fouling deposits are always present and cannot burn away, the overall design ensures reliable and efficient operation.

Product Features:
  • Power tip X does not use side ground electrode
  • No need for indexing of spark plug
  • No gap setting to adjust or monitor
  • Power tip X reduces the volume of combustion chamber for increased Compression Ratio
  • Enhanced Performance: The Autolite Racing Non-Resistor Spark Plug increases the Compression Ratio, delivering superior performance for racing applications.
  • Cold Operation: The center electrode and insulator tip operate extremely cold, making the spark plug nearly impervious to pre-ignition.
  • Reliable and Efficient: Despite the presence of fouling deposits, the overall design ensures reliable and efficient operation under intense conditions.

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4.69 out of 5
32 Customer Reviews
89% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
28
4 Stars
2
3 Stars
0
2 Stars
0
1 Star
2
Number one go to business
Pros
3
Improves Engine Efficiency
3
Increases Power
2
Durable
2
Easy To Install
1
Engine runs strong
Cons
1
Mmm
1
Plugs Do Not Make Power
1
They Restore Power If
1
They Were Fouled
1
Can not comment on this
Best Uses
3
Racing
1
410 ci. Alcohol engine 16:1 compression
Car & Truck
1
Competitive Driver
Describe Yourself
2
Auto Enthusiast
1
Mechanic
1
Race engine builder tun
Most Liked Positive Review
Black Friday can't beat this deal
I have used this product in all my blown & injected alky burning sbc engines with great success from reliability,performance and longevity. I have also started to use this product in a triple turbocharged alky burning tractor puller that i help work on that belongs to a friend of mine that we had some problems with other brands before. they seem to hold up better since we changed over to a pro mag 44 ignition.
Most Liked Negative Review
wrong plugs
they were the wrong plugs I put all the right info and got plugs that were wrong
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Displaying Reviews 1 - 5Back to Top

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Will this item fit a 2003 mitsubishi lancer o-z rally edition?
Verified Reply - Solomon
No Azriel, this Autolite Racing Non-Resistor Spark Plug (Part # AR3931) does not fit your 2003 Mitsubishi Lancer OZ Rally. The exact spark plug for your vehicle is currently unavailable online. I would suggest that you visit the nearest Advance Auto Parts store to check the availability of this part.
Will these plugs work with a 1978 mercedes-benz 450sl 4.5
Verified Reply - Solomon
No Mike, this Autolite Racing Non-Resistor Spark Plug (Part # AR3932) does not fit your 1978 Mercedes-Benz 450SL 4.5L. We do have an exact spark plug available online for your vehicle and the part number is AP64. Please enter your vehicle on our website and search for this part to check the fitment.
Do these fit a 2013 VW Passat TDI SE 2.0l turbo?
Verified Reply - Solomon
No COREY, this Autolite Racing Non-Resistor Spark Plug (Part # AR3932) does not fit your 2013 Volkswagen Passat TDI SE 2.0L. The exact spark plugs for your vehicle is currently unavailable online. I would suggest that you visit the nearest Advance Auto Parts store to check the availability of this part.
Can someone confirm that this works on a 2021 Subaru Crosstrek with a 2.5 l engine
Verified Reply - Solomon
No Justin, this Autolite Racing Non-Resistor Spark Plug (Part # AR133) does not fit your 2021 Subaru Crosstrek 2.5L. The exact spark plugs for your vehicle is currently unavailable online. I would suggest that you visit the nearest Advance Auto Parts store to check the availability of this part.
Do these work on a Brz
Verified Reply - Steve
Hi Marvin! To check compatibility, please provide your Subaru BRZ's year and engine size, so I can assist you further.
Displaying Question & Answer 1-5

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