Autolite AR3910 14mm Racing Spark Plug-5/8 Hex-Gasket-3/4 Reach-Cold
Universal Fit, Gasket Seat Taper, .75" Spark Plug Reach
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Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range needed with Standard tip or Power tip Coldest.
- 14 mm plug
- .75" reach
- 5/8" hex
- Gasket seat
- Vendor Number: AR3910
Note: Please use the Vendor Number to reference the PDF chart links listed.
Heat Range Chart (PDF)
Racing Plug Tech Note (PDF)
Understanding Heat Range (PDF)
Vendor Part Number AR3910
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