ACDelco 41-993 Professional Iridium Spark Plug

Last updated: January 4, 2023


We looked at the top Spark Plugs and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Spark Plug you should buy.

Product Details

In our analysis of 12 expert reviews, the ACDelco 41-993 Professional Iridium Spark Plug placed 12th when we looked at the top 12 products in the category. For the full ranking, see below.

From The Manufacturer

ACDelco Professional Iridium Spark Plugs are the high quality replacement ideal for many vehicles on the road today. They are our latest in spark plug technology and an exact replacement for your vehicle’s original components. Iridium composition provides a high melting point and great strength, and provides excellent wear resistance and durability. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.

Expert Reviews


What reviewers liked

It provides stable and smooth performance. It provides quicker acceleration. It improves cold engines. It helps reduce the use of fuel. It prevents combustion leakage.
These Iridium spark plugs are unique because they have a one-piece suppressor seal that blocks out radio frequencies, which can affect the electronics in vehicles.

What reviewers didn't like

Customers complained about receiving reject plugs or plugs that are not the same match. May not work on all types of vehicles.
Most people who didn’t like the spark plugs had damaged plugs, so they didn’t get a chance to see how well they worked.
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