NOTE: Plugs are sold in quantities of (4), but billed individually. When ordering please change quantity from (1) to (4).

Autolite AR3923 High Performance Racing Resistor Spark Plugs

Guaranteed to deliver quick starts, good fuel economy and smooth acceleration. Autolite Copper Core plugs are your industry standard.

Features:

• 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

Reach: 3/4"

Hex Size: 5/8" (16mm)

Seat: Gasket

Tip Configuration: Mid Projection

Resistor: Resistor

Metallurgy: Copper

Loose Terminal: Yes