(8-Pack) NGK Spark Plugs IZTR5B11 (Stock # 1465)

These are the correct spark plugs for GM 4.8 thru 6.0 liter engines, they were also set to the revised factory spec of .40 of an inch. They were packaged well and shipped with collars around the threads, to not only protect the threads, but also the electrode from being bent if package is dropped. If these maintain their price of roughly $64 for 8, then this is a great deal. My truck’s 4.8 runs smoothly and power is very good, I would dare say feels like a brand-new truck. So far these have worked well, I am also using the Edelbrock 22716 Ultra Spark 50 spark plug wires, will come back and edit review if the spark plugs fail for some reason. Currently I highly recommend these spark plugs.