Autolite AR3910X High Performance Racing Non-Resistor Spark Plugs
Guaranteed to deliver quick starts, good fuel economy and smooth acceleration. Autolite Copper Core plugs are your industry standard.
- 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.
Thread Size: 14mm X 1.25
Hex Size: 5/8" (16mm)
Tip Configuration: Mid Projection
Resistor: Non Resistor
Loose Terminal: No