Does AC Delco make iridium spark plugs?
Yes. AC Delco offers iridium spark plugs as part of its aftermarket lineup, including GM OE-compatible designs. Availability varies by market and vehicle, but the brand does provide iridium options.
AC Delco's iridium spark plug lineup
AC Delco markets iridium plugs as OEM-aligned replacements that emphasize longevity and reliable performance for modern engines. The lineup is designed to fit a broad range of GM vehicles and many non-GM applications through official cross-references.
- Iridium-based center-electrode spark plugs designed to deliver extended service life and stable ignition under varied operating conditions.
- GM OE-aligned specifications intended to fit both GM vehicles and a wide range of non-GM applications via cross-reference data.
- Various heat ranges and thread sizes to accommodate different engine designs, with some plugs pre-gapped or ready for final gap adjustment by the installer.
- Availability through authorized distributors and the AC Delco online catalog, including cross-reference data to OEM GM part numbers.
In short, AC Delco's iridium offerings are positioned as OEM-quality replacements that aim to deliver longevity and reliable performance across vehicles that require iridium technology.
How to identify the right AC Delco iridium plug for your vehicle
Before selecting a part, verify your vehicle's ignition system requirements and GM OE compatibility. The steps below help ensure you pick the correct plug.
- Check your vehicle’s owner’s manual or service manual for the recommended spark plug type, heat range, and gap specification.
- Obtain the GM OE part number for your engine or use AC Delco’s cross-reference tool to find the matching AC Delco part number.
- Confirm thread size, reach length, and ignition gap requirements match your engine’s design.
- Verify whether the plug is pre-gapped and whether you’ll need to adjust the gap during installation.
- Confirm availability and warranty terms from an authorized retailer or distributor.
Following these steps helps ensure you source the correct AC Delco iridium spark plug for your vehicle’s engine.
Why you might choose AC Delco iridium plugs
Iridium plugs are commonly selected for longevity, ignition stability, and resistance to fouling in modern engines. AC Delco’s iridium plugs are positioned as OEM-aligned replacements that can contribute to reliable starts and efficient combustion, particularly in engines designed for longer maintenance intervals.
- Longer service life compared to traditional copper plugs due to the durable iridium alloy.
- Stable performance across a wide range of temperatures and operating conditions.
- GM OE cross-compatibility to support both GM and non-GM vehicles with verified cross-references.
While iridium plugs offer longevity, the best choice depends on your engine’s design, maintenance schedule, and driving conditions. For some older or high-mileage engines, platinum or copper alternatives may be more cost-effective or appropriate.
Summary
AC Delco does manufacture iridium spark plugs as part of its aftermarket and GM OE-aligned offerings. The brand positions these plugs as long-life, high-performance options designed to suit a wide range of engines. To ensure you select the correct part, consult your owner’s manual, use AC Delco’s cross-reference tools, and buy through authorized retailers to maintain warranty coverage and ensure compatibility.
