AC-Delco Platinum Spark Plug Set of 8 FOR LS1 LS2 LS3 LS6 L99 ENGINES

Fits my 07 Chevy Silverado perfectly

They were the same as the ones i replaced on the 6.0 vortec in my 2012 4500 chevy express

Came as described and installed easily

I gave 4 stars only because they are a direct replacement and they do not do anything that my original plugs didn't do. My 2005 Sierra ran fine with the old plugs, and it runs fine with these plugs. I only replaced them because the factory plugs had over 100k miles on them. These plugs were pre-gapped, but I did check them before installing and they were spot on. If my truck lasts another 100k miles, I would buy these plugs again.

Some of the plugs were not gapped properly but it’s to be expected.

Spark plugs only lasted for one week and had me broke down on the side of the road and my truck was misfiring on 4 spark plugs, Bought New spark plugs from autozone to get the truck to run and make it home. I will never go cheap again, Just spend the money and get the good stuff. I was very disappointed broke down on the side of the side.

Perform great on my 2002 Avalanche 5.3. Zero misses compared to the NGK plugs that were in it.

AC Delco platinum spark plugs set worked as expected. I have used these spark plugs before.