Four (4) Used Cylinders from a Lycoming O-320 “narrow deck” 150hp engine. All cylinders have less than 800 hours. All compressions were above 70 when removed. One cylinder was removed due to an FAA AD note for removal at 800 hours and also had a crack on exhaust side. One cylinder removed for crack on exhaust side. Two cylinders have no known issues. (AKA perfectly fine but removed so all cylinders had same time) I’m not a mechanic but will find answers as needed. They are going to sit on a shelf or turn into planters. Make me an offer. (pics of installed new cylinders, not of used)