NGK Spark Plug P/N:YR5

Designed for dependable ignition in classic GM engines, this NGK spark plug is the V-Power YR5 (NGK stock number 7052). NGK says V-Power plugs offer reliable performance and better ignitability than standard nickel plugs. The YR5 fits many vehicles, among them the 1972-1974 Chevrolet Camaro [V8-5.7L] and 1975-1989 Chevrolet P20 [L6-4.8L]. Many more Chevrolet, Buick and GMC fitments are in the Buyer's Guide tab.

• OE or equivalent design: NGK built it specifically for OE applications. A nickel center electrode tip with a V-groove pairs with a concave ground electrode. This design is meant to increase ignitability for quicker starts and a smoother idle.
• Solid copper core: A 98% pure copper core provides heat dissipation and conductivity.
• OE ceramic technology: A high-grade ceramic insulator gives strong dielectric performance.
• Trivalent metal plating and cold-rolled threads: The plating resists corrosion and seizing, which makes installation and removal easier. The rolled threads are designed to help prevent cross-threading and damage to the cylinder head.

Specifications:
Grade: standard replacement
Thread: M14-1.25 metric
Reach: 0.460 in (11.2 mm)
Seat: tapered, no washer included
Heat range: 5
Gap: J-gap ground, pre-gapped at .040 in (1.0 mm)
Resistor: 5,000 ohm
Center electrode: non-projected
Terminal: non-removable nut
Country of origin: Japan

NGK recommends V-Power plugs for vehicles that came with OE nickel alloy plugs. It does not recommend them for vehicles with factory precious-metal plugs. The listed applications use L6-4.1L, L6-4.8L, V8-5.0L, V8-5.7L, V8-6.0L, V8-6.6L, V8-7.0L and V8-7.4L engines. The six-cylinder applications take 6 plugs and the V8 applications take 8.