Just like the title says, selling these NOS OEM Jonsered 2077/2083 Poulan Pro 505/Partner 7000 54mm bore cylinder and piston kits. These topends are hard to find. Mahle cylinders and mahle pistons. One piston has single ring the other has (2) ring setup. From what I understand is the single ring is the early version 2083/505 54mm Pre EPA and the dual ring is 2083/505 54mm EPA version?? If the Jreds pros could please let me know if I'm wrong I would appreciate that. Asking $250 each with free shipping in US. No clips or decomps. What you see is what you get.