Need Piston Rings? 
FAA-PMA ASC10545 Rev B Piston
Angle Valve Turbo Charged Lycoming Series Engines
7.2:1 Compression Ratio
5.125 Bore
Approx Weight = 1365 grams
This piston uses standard Lycoming Rings and Piston Pins
This Piston is FAA-PMA approved
Installation Eligibility - Service Instruction 1037K
Forged and Machined in the USA