



⚡ Ignite your drive with GM’s precision-engineered iridium spark plug!
The ACDelco GM Original Equipment 41-993 Iridium Spark Plug delivers superior engine idle stability and quick acceleration through its fine-wire iridium electrode. Designed and rigorously tested by GM engineers for Chevrolet, Buick, GMC, and Cadillac vehicles, it features a one-piece suppressor seal that blocks radio interference and extends electrode life. This spark plug ensures reliable cold starts, reduces carbon buildup, and maintains optimal combustion efficiency, making it a trusted OEM part built for lasting performance.







| Brand | ACDelco |
| Core Material | Iridium |
| Thread Size | RM |
| Top Material Type | Iridium |
| Vehicle Service Type | Car |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 808709617198 |
| Manufacturer | ACDelco |
| Model | GM Original Equipment |
| Product Dimensions | 8.66 x 8.26 x 2.24 cm; 40.82 g |
| Item model number | 41-993 |
| Exterior | Machined |
| Manufacturer Part Number | 12681665 |
| Assembly Required | No |
| Manufacturer | ACDelco |
| Country of Origin | USA |
| Item Weight | 40.8 g |
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