Spark Plug for 1975-1986 Ford F-150 & More - NGK WR5IX

NGK WR5IX spark plug for the 1975-1976 Ford F-150 V8 5.9L or 6.4L, the 1975-1986 F-150 6-cylinder 4.9L and other vehicles ignites the air-fuel mixture in the cylinder with an iridium center electrode. It is an NGK Iridium IX spark plug, a line made for performance enthusiasts.

• NGK Iridium IX spark plug with a 0.6 mm fine-wire iridium tip center electrode for durability and a stable spark
• Iridium alloy center electrode with a very high melting point, suited to modern high-efficiency engines
• Tapered cut ground electrode with a reduced-quenching design for ignitability, starting, idling and throttle response
• Solid copper core, 98% pure copper, for heat dissipation, conductivity and wide heat ranges
• Trivalent metal plating that resists corrosion and seizing
• Recommended for modified or high-performance engines

Quick facts

• Part: NGK WR5IX spark plug
• Fits: the 1975-1976 Ford F-150 V8 5.9L or 6.4L, the 1975-1986 F-150 6-cylinder 4.9L and other vehicles
• Condition: New

Misfires, hard starting or a rough idle can point to worn spark plugs. A failing ignition coil, damaged spark plug wires or a fuel injector problem can bring on the same symptoms, so track down the cause before buying spark plugs. Each engine takes one spark plug per cylinder, so the 6-cylinder engines take six and the V8 engines take eight.

Fits

The 1975-1976 Ford F-150 V8 5.9L or 6.4L, the 1975-1986 F-150 6-cylinder 4.9L, the 1965-1986 Ford F-250 6-cylinder 4.9L and the 1964-1970 Ford Mustang 6-cylinder 3.3L all take this spark plug, and so do many other vehicles. If your car is not named here, look it up by year and engine on the Buyer's Guide tab.

Specifications

In the box

The spark plug itself; washers are not included.

Interchange: 7510