Review on 🔥 ACDelco D581 GM Original Equipment Ignition Coil - Enhanced Performance and Reliability for Optimum Engine Ignition by Knate Scarpelli

Looks and feels like Original OEM. I believe the box said Made in Mexico where the OEM was supposed to be from. Replaced all 8 after having 2 failures within a month. The last set was bought from an auto parts store and only lasted 4 years. I had severe engine knock giving out random cylinder misfire codes and was finally able to narrow it down to cylinders 3 and 4. I also replaced all 8 injectors, spark plugs, MAF sensor, O2 sensors, fuel filter and cats. I hate misfires so I've decided to replace any other problem areas when we take this car for road trips. We also have over 400,000 miles on the truck so I'm used to doing maintenance jobs.