Spark Plug - 18 MM Thread - 0.468 In Reach - Tapered Seat - Resistor - Each
AUTOLITE  |  Part# AUT-45   More Details...

Spark Plug - Racing - 14 MM Thread - 0.708 In Reach - Tapered Seat - NON-RESISTOR - Each
AUTOLITE  |  Part# AUT-AR94   More Details...

Spark Plug - 14 MM Thread - 0.750 In Reach - Gasket Seat - Resistor - Each
AUTOLITE  |  Part# AUT-3922   More Details...

Spark Plug - 14 MM Thread - 0.750 In Reach - Gasket Seat - Resistor - Each
AUTOLITE  |  Part# AUT-3923   More Details...

Spark Plug - 14 MM Thread - 0.460 In Reach - Tapered Seat - Resistor - Each
AUTOLITE  |  Part# AUT-25   More Details...

Spark Plug - Shorty - 14 MM Thread - 0.750 In Reach - Gasket Seat - Resistor - Set Of 4
ACCEL IGNITION  |  Part# ACL-0414S-4   More Details...

Spark Plug - Shorty - 14 MM Thread - 0.750 In Reach - Gasket Seat - Resistor - Set Of 4
ACCEL IGNITION  |  Part# ACL-0416S-4   More Details...

Spark Plug - Racing - 14 MM Thread - 0.750 In Reach - Gasket Seat - NON-RESISTOR - Each
AUTOLITE  |  Part# AUT-AR51   More Details...

Spark Plug - 14 MM Thread - 0.750 In Reach - Gasket Seat - Resistor - Each
AUTOLITE  |  Part# AUT-3926   More Details...

Spark Plug - Racing - 14 MM Thread - 0.375 In Reach - Gasket Seat - NON-RESISTOR - Each
AUTOLITE  |  Part# AUT-AR73   More Details...