


⚡ Ignite your ride with precision-engineered power!
The GM Original Equipment 41-156 Iridium Spark Plug features a high-strength iridium core for exceptional durability and wear resistance. Engineered with a three-piece suppressor seal, it ensures optimal spark energy delivery while preventing combustion leakage and electronic interference. Designed and rigorously tested by GM engineers, this spark plug offers reliable cold starts, smooth acceleration, and stable engine idle, fitting perfectly with Chevrolet, Buick, GMC, and Cadillac vehicles for a seamless upgrade experience.







| Brand | ACDelco |
| Core Material | Iridium |
| Thread Size | M14x1.25 |
| Top Material Type | iridium |
| Vehicle Service Type | Motorcycle |
| Global Trade Identification Number | 40808709663247 |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 808709663249 |
| OEM Part Number | 12683541 |
| Manufacturer | ACDelco |
| Model | GM Original Equipment |
| Item Weight | 5 ounces |
| Product Dimensions | 3.7 x 3.2 x 0.8 inches |
| Item model number | 41-156 |
| Exterior | Machined |
| Manufacturer Part Number | 41-156 |
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