Top overhauling my O-320. 4 certified cylinders with paperwork. 1 Jug was in 40s on compressions, 1 Jug had a broken oil scraper ring and was buring oil. The other two jugs both have compressions in the low 70's and are in good condition. All cylinders have about 1000 hours on them, approx. 800 in the past 5 years. wrist pins and pistons come with cylinders.
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