Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range Medium.
- Standard tip
- 14 mm plug
- .375" reach
- 13/16" hex
- Gasket seat
- Non-resistor
- Vendor Number: 353
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)
Autolite Cross Reference Chart (PDF)