ACDelco 41-103 Professional Iridium Spark Plug (6 Pack)

AC Delco 41-103 Iridium Spark Plugs are said to be perfect for Chevy Trailblazer, Chevy Colorado, and other Chevy vehicles that require the same dimensions. Customers have been very pleased with the quality of the product, as it comes as advertised and has helped with their car's performance and gas mileage. However, some customers have experienced issues with counterfeit plugs that have worn down quickly or have not had the three white dots that indicate they are authentic. It is recommended to be careful with cross-threading when installing these spark plugs and to use anti-seize on the threads. Additionally, the product is a bit more expensive than other brands. Overall, AC Delco 41-103 Iridium Spark Plugs have received positive feedback and are a good investment for those with compatible Chevy vehicles.