NGK 7516 spark plug for the 1972-1973 Chevrolet Impala 6-cylinder 4.1L, the 1972-1974 Impala V8 5.7L, 6.6L or 7.4L and other vehicles ignites the air-fuel mixture in the cylinder. Among NGK spark plugs, this Iridium IX plug is made for performance enthusiasts and is recommended for modified or high-performance applications, or as an upgrade to OE nickel alloy plugs.
- NGK Iridium IX line, made for the performance enthusiast
- Fine wire 0.6 millimeter iridium tip center electrode for durability and a stable spark
- Iridium alloy with six times the density of platinum and a very high melting point
- Tapered cut ground electrode with a reduced quenching design for ignitability, acceleration and fuel efficiency
- Solid copper core of 98% pure copper for heat dissipation, conductivity and ultra wide heat ranges
- Trivalent metal plating for anti-corrosion and anti-seizing properties
Quick facts
- Part: NGK 7516 spark plug
- Fits: the 1972-1973 Chevrolet Impala 6-cylinder 4.1L, the 1972-1974 Impala V8 5.7L, 6.6L or 7.4L and other vehicles
- Condition: New
Ignition wires, the distributor cap or a vacuum leak can be behind hard starting, a misfire or a rough idle just as worn plugs can, so find out which one it is before you buy.
Fits
This plug is listed for a wide range of Chevrolet, GMC and Pontiac models. Besides the Impala, the list includes the 1972 Chevrolet Camaro V8 6.6L, the 1972-1973 Camaro V8 5.0L, the 1972-1974 Camaro 6-cylinder 4.1L or V8 5.7L and the 1993-1998 Chevrolet B7 V8 6.0L. The 6-cylinder 4.1L engines take six plugs and the V8 engines take eight. If your car is not named here, open the "Vehicles it fits" section and look up your exact model and engine.
Specifications
Fit and size
- Quantity per vehicle: 6 on the 6-cylinder engines, 8 on the V8 engines
- Thread: M14 - 1.25
Build and materials
- Type: single iridium
- Center electrode: iridium alloy, fine wire 0.6 millimeter tip
- Ground electrode: tapered cut
- Core: solid copper, 98% pure
- Plating: trivalent metal
- NGK part number: YR5IX
- Condition: New
Interchange: T16R-U15
AP145DP2 · 4206 · HR9APX · 5030 · YR5IX
This part cross-references / interchanges with the following part numbers:
AP145DP2, 4206, HR9APX, 5030, T16R-U15, 7516, YR5IX
Frequently Asked Questions
Is this a Chevy Impala spark plug for the 1972-1974 Chevrolet Impala V8 7.4L?
Yes, NGK 7516 is listed for the 1972-1974 Chevrolet Impala V8 7.4L, which takes eight plugs. Use the "Vehicles it fits" section to look up other models and engines.
Do these Camaro spark plugs fit the 1972-1974 Chevrolet Camaro V8 5.7L?
Yes, NGK 7516 is listed for the 1972-1974 Chevrolet Camaro V8 5.7L, and that engine takes eight plugs.
What is the center electrode on this NGK Iridium IX spark plug made of?
It is a single iridium tip: a fine wire 0.6 millimeter iridium alloy center electrode. Iridium has six times the density of platinum and a very high melting point.
Do NGK iridium spark plugs like the 7516 have a copper core?
Yes. NGK 7516 has a solid copper core made of 98% pure copper, which gives heat dissipation, conductivity and ultra wide heat ranges.
Does the plating on this spark plug make it easier to install and remove?
Yes. The trivalent metal plating gives this spark plug anti-corrosion and anti-seizing properties, which ease installation and removal.
