Best Terminal Insulator

Autolite 5325-4PK Copper Resistor Spark Plug, Pack of 4

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof.
Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength.
Multi-rib insulator reduces danger of "flash-over".
Resistor reduces radio frequency interference (RFI) and electrode erosion.
Full copper core electrode provides better performance in all conditions.

Autolite 4063-4PK Copper Resistor Spark Plug, Pack of 4

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof.
Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength.
Multi-rib insulator reduces danger of "flash-over".
Resistor reduces radio frequency interference (RFI) and electrode erosion.
Full copper core electrode provides better performance in all conditions.

Autolite 65-4PK Copper Resistor Spark Plug, Pack of 4

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof.
Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength.
Multi-rib insulator reduces danger of "flash-over".
Resistor reduces radio frequency interference (RFI) and electrode erosion.
Full copper core electrode provides better performance in all conditions.

Autolite 254 Copper Non-Resistor Spark Plug, Pack of 1

Designed to meet or exceed OE designs to deliver dependable performance for all outdoor power equipment and recreational vehicles.
Cold-formed steel shell and precision rolled threads.
One-piece terminal post for added strength.
Multi-rib insulator reduces danger of "flash-over".
Copper-glass, non-resistive seal bonds insulator, terminal post, and center electrode together ensures full required voltage at spark gap.

Autolite 4093-4PK Copper Non-Resistor Spark Plug, 4 Pack

copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof.
cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength.
"multi-rib insulator reduces danger of ""flash-over""".
resistor reduces radio frequency interference (rfi) and electrode erosion.
full copper core electrode provides better performance in all conditions.

Autolite 216-4PK Copper Non-Resistor Spark Plug, Pack of 4

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof.
Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength.
Multi-rib insulator reduces danger of "flash-over".
Resistor reduces radio frequency interference (RFI) and electrode erosion.
Full copper core electrode provides better performance in all conditions.

Autolite 3116-4PK Copper Non-Resistor Spark Plug, Pack of 4

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof.
Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength.
Multi-rib insulator reduces danger of "flash-over".
Resistor reduces radio frequency interference (RFI) and electrode erosion.
Full copper core electrode provides better performance in all conditions.

Seachoice 13571 6-Gang Terminal Block – Rated 30 Amps at 12V DC – Nickel Plated Brass Terminals

Provides a secure joint for up to 4 sets of wires in close proximity.
Moisture-repellent bakelite insulator base for superiorheat and chemical resistance.
Nickel-plated brass terminals resist corrosion.
Features insulator protective barrier strips.
Terminal block dimensions are 4-3/8 inches long x 1-5/16 inches wide x 11/16 inches high.

Bosch 7547 (WSR6F) Spark Plug, Pack of 2

Nickel-Plated Rolled Threads Provide Anti-Seize and Corrosion Protection.
Tapered Cut Nickel Chromium Ground Electrode Assists in Cold Weather Starts and Provides Increased Ignitability.
Angular, 5-Rib Insulator Design Prevents Flashover.

ACDelco 9748HH Professional Spark Plug Wire Set

Wire conductor, wire length, and diameter help provide maximum spark delivery and protection.
Spark plug distributor boot shape and materials provide proper fit, installation, and water-tight seal.
Terminal design improves spark plug retention and assists installation with excellent corrosion resistance.
Insulator employs high dielectric materials.
Coil retainer prevents fretting and micro-arcing.

ACDelco 9746BB Professional Spark Plug Wire Set

Wire conductor, wire length, and diameter help provide maximum spark delivery and protection.
Spark plug distributor boot shape and materials provide proper fit, installation, and water-tight seal.
Terminal design improves spark plug retention and assists installation with excellent corrosion resistance.
Insulator employs high dielectric materials.
Coil retainer prevents fretting and micro-arcing.

ACDelco 9748UU Professional Spark Plug Wire Set

Wire conductor, wire length, and diameter help provide maximum spark delivery and protection.
Spark plug distributor boot shape and materials provide proper fit, installation, and water-tight seal.
Terminal design improves spark plug retention and assists installation with excellent corrosion resistance.
Insulator employs high dielectric materials.
Coil retainer prevents fretting and micro-arcing.

ACDelco Professional 9718Q Spark Plug Wire Set

Wire conductor, wire length, and diameter help provide maximum spark delivery and protection.
Spark plug distributor boot shape and materials provide proper fit, installation, and water-tight seal.
Terminal design improves spark plug retention and assists installation with excellent corrosion resistance.
Insulator employs high dielectric materials. The length of the wire is 28.2 inches.
Coil retainer prevents fretting and micro-arcing.