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These plugs we're a fantastic buy and exactly what I needed to tune up my Corvette. The car runs great and I can really tell the difference even though the old plugs we're in great condition. The iridium plugs are the only way to go for performance you can feel and the increase in MPG at the pump! I won't use anything else in my vechiels from now on. Thanks for the great price for a fantastic product.
Verified purchase: Yes | Condition: New
They were the correct plugs for my 2010 SS Camaro, but they were terrible once I installed them. Car ran terrible idled rough stalled 3 times while parked. Went to the local auto parts dealer replaced with the exact same plugs but a way higher price. Installed them,now car runs perfect. After looking at the plugs found some porcelain on the insulator tip near the center electrodes were chipped.
Verified purchase: Yes | Condition: New
These plugs are of excellent quality. I saw an immediate improvement in performance after installing them. Though I must admit that the plugs being replaced should have been replaced long before. I expect fuel consumption to decrease as well. These plugs will probably outlast the truck, but I will certainly use them again should the need arise.
Verified purchase: Yes | Condition: New
Just installed today. They look like a good quality type plug with AC Delco markings. Truck fired up and runs great. Will know more as time of use increases.
Verified purchase: Yes | Condition: New
It's an OEM parts made in USA stamped in every spark plug. I'm confident that these will last longer for the quality of US parts are remarkably high compared to parts made elsewhere. Highly recommended product.
Verified purchase: Yes | Condition: New
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