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- ASC69841 F REV A Piston
- Parallel Valve Lycoming O-290/435 Series Engines
- 7.5:1 Compression Ratio
- 4.875 Bore
- Approx Weight = 1095 grams
- This piston uses standard Lycoming Rings and Piston Pins
- J & J Airparts has STD & P10 Steel Barrel & STD Chrome Barrel Ring Sets
- Top 2 Ring Grooves are Full Keystone - Lycoming Piston Ring 62916 or 13883
- Uses Oil Control Lycoming Piston Ring 69401
- Oil Scraper Groove (below pin) Omitted
- This Piston is not FAA-PMA Approved and is for experimental or ground use only
- Forged and Machined in the USA