As the title states, this is an OEM Stihl MS 460/046 cylinder. I bought it to either make my MS 440 a hybrid, or a spare for my MS 460... I am not gonna tear into my Mint 440 to make it a Hybrid and my 460 probably won't need a new jug in my lifetime. I bought it used (same as it is now) and someone did bevel the factory ports, but it's not ported in any way. Just smoothed over. It's in very good shape and has no scoring or lines on the exhaust side. Good replacement for your MS 460 or to make a 440 a hybrid! Looking to get $100 shipped. I have an Aftermarket (brand new) piston and rings (circlips, wrist pin, etc) if you need a piston as well. Add $15 for the piston. I can snap pics of piston as well. But it's a new piston/rings.