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

Autolite AR3931 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.

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: Short Projection

Resistor: Non Resistor

Metallurgy: Copper

Loose Terminal: No