Resistor

Guaranteed to deliver quick starts, good fuel economy and smooth acceleration. The copper core increases the rate of heat conduction in the spark plug tip and improves resistance to all types of fouling.

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


Spark Plug Type Performance Differences



How to Install Autolite Spark Plugs


Spark Plug Types
Spark Plug Firing Tips Tech Info
Center Electrode Core Material Copper
Electrical Terminal Type Stud
Center Electrode Tip Material Nickel
Center Electrode Design Standard / Regular
Ground Electrode Core Material Nickel
Ground Electrode Configuration Single
Ground Electrode Design Tapered
Ground Electrode Tip Material Nickel
Insulator Material Ceramic
Insulator Type Mid
Reach (in) .750"
Resistance 4000
Gap (Factory Preset) .035"
Thread Size 14mm X 1.25
Drive Size 13/16" (21mm)
Seat Style Gasket
Resistor Resistor
Alternate/OEM Part Number(s): 65BP, 65DP2