NGK 7293 Spark Plug

NGK Iridium IX Spark Plug 7293

NGK Iridium IX Spark Plug 7293 is built for drivers restoring or maintaining older Buick, Oldsmobile, Pontiac, and Cadillac engines that call for a precise OE-style spark plug. With an iridium center electrode, nickel ground electrode, and a 5,000-ohm resistor, it supports consistent ignition performance and stable operation in a wide range of classic GM applications.

Key Features

• Iridium center electrode tip for durable spark delivery
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with taper-cut tip design
• 5,000-ohm resistor helps control electrical noise
• 14 mm thread diameter, .375 reach, and flat seat design
• Pre-gapped at .060 inches for many listed applications
• NGK part number 7293, also identified as XR45IX

Iridium IX Product Line Details

NGK Iridium IX plugs are part of NGK’s performance-focused spark plug line, combining a fine iridium firing tip with OE-level construction details. That design supports reliable ignition in engines that benefit from a stable spark, including older Buick LeSabre and Riviera, Oldsmobile Cutlass and Delta 88, and Pontiac Bonneville and Firebird applications.

Detailed Description

NGK has long supplied original equipment spark plugs for domestic and import vehicles, and the 7293 Iridium IX reflects that background with a practical mix of durability and ignition control. The 13/16 hex size, non-removable nut terminal, and heat range 4 specification make this plug a direct-fit style choice for many classic GM V8 and related applications. This part cross-references 41-818 and AP847 for the same application.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire concerns from degraded electrode surfaces
• Rough idle in older Buick, Oldsmobile, Pontiac, and Cadillac engines
• Weak ignition performance from excessive plug wear
• Electrical interference concerns in resistor-equipped ignition systems

Installation Notes and Tips

Verify the required gap before installation, since listed applications include both .060-inch and .080-inch specifications depending on year and engine setup. Confirm thread diameter, reach, seat type, and terminal style against the vehicle’s service information before installing NGK 7293. For fitment examples, this plug fits 1976-1979 Oldsmobile Cutlass, 1980-1984 Buick LeSabre, and 1977-1979 Pontiac Firebird, with notes varying by application.

Quality Assurance

NGK is a major OE spark plug supplier with more than 80 years of automotive manufacturing experience. The brand’s North American and global production and distribution network supports consistent product standards for ignition service parts like the NGK 7293 spark plug.