Those things are torqued to 150 pounds. Not that much really. The threads are fat and flat - unlike anything I've ever seen before. From what I understand, the first time they're installed they more or less "self tap". Taking them apart you're primarily fighting rust. Impact guns don't quite cut it n my opinion - you really need a breaker bar and a 6 foot piece of pipe as an extension doesn't hurt! You want steady pressure, no sudden tugs, which will help keep the socket seated on the BJ.