NGK 7272 Spark Plug

NGK Iridium IX Spark Plug for OE-Style Ignition Performance

NGK Iridium IX Spark Plug 7272 is built for drivers who need a precise replacement spark plug with stable ignition performance and OE-style fitment. It uses an iridium center electrode, copper core, and a tapered seat to support consistent combustion in a wide range of GM applications, including Chevrolet S10, Camaro, Astro, and Pontiac Fiero.

Key Features

• Iridium center electrode tip material for durable spark delivery
• Copper core center electrode for efficient heat transfer
• 5000 ohm resistance for ignition system compatibility
• Taper cut ground electrode tip design with standard ground configuration
• Pre-gapped at .060 inch for listed applications
• 14 mm thread diameter, 5/8 hex size, tapered seat
• NGK part number 7272, also listed as UR55IX

Product Details

As part of the NGK Iridium IX Spark Plug line, this plug is engineered around a fine iridium firing tip and a nickel ground electrode to support reliable spark concentration and long service life in everyday driving conditions. NGK’s OE manufacturing background and North American coverage make this a practical choice for owners maintaining older Chevrolet, GMC, Buick, Oldsmobile, and Pontiac vehicles. This part cross-references AC Delco 41-816 and 41-826 for the same application.

What This Spark Plug Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Rough idle from weak ignition output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded combustion efficiency
• Maintenance replacement for aging ignition service intervals

Installation Notes and Fitment

Verify the plug gap is set to .060 inch before installation and confirm the tapered seat and 14 mm thread specification match the cylinder head. Fits 1985-1993 Chevrolet S10, N/A; Fits 1985-1990 Chevrolet Astro, N/A; Fits 1984-1986 Chevrolet Camaro, N/A; Fits 1984-1990 Chevrolet Celebrity, N/A; Fits 1990-1992 Chevrolet Lumina, N/A; Fits 1985-1988 Chevrolet S10 Blazer, N/A; Fits 1984-1985 Chevrolet Citation II, N/A; Fits 1984-1992 Buick Century, N/A; Fits 1983-1991 Buick Skylark, N/A; Fits 1988-1991 Oldsmobile Cutlass Calais, N/A; Fits 1984-1992 Oldsmobile Cutlass Ciera, N/A; Fits 1987-1990 Oldsmobile Cutlass Cruiser, N/A; Fits 1984-1986 Pontiac Firebird, N/A; Fits 1984-1988 Pontiac Fiero, N/A; Fits 1985-1991 Pontiac Grand Am, N/A; Fits 1984-1991 Pontiac 6000, N/A; Fits 1991-1993 GMC Sonoma, N/A; Fits 1985-1990 GMC Safari, N/A; Fits 1985-1990 GMC S15, N/A; Fits 1985-1988 GMC S15 Jimmy, N/A.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with decades of automotive ignition expertise. The brand’s focus on original equipment standards, manufacturing control, and broad vehicle coverage supports dependable replacement selection for service work on Chevrolet S10, Pontiac Fiero, and other listed applications.