Review on Edelbrock 22716 Sleeves Resistance Performance by Marcus Rash

Installed on GMC Sierra 4.8L 2011, they click a little weaker than OE. The truck seems to perform just as well, if not a little better. They are thicker than the originals but also an inch or two longer so I gave 4 stars, these plugs are for LS motors but Edelbrock can't figure out the length properly. I think the performance gain will be more noticeable. if they were the right length. The truck used more fuel after installation, and I did everything very carefully, including gaping candles. I don't know if this is due to better spark which burns more fuel or longer wires which mess up the ignition curve and cause more fuel consumption.