Piston Ring Tech: A Closer Look at Summit Racing Pro GPX Gas Ported Piston Rings
Piston Rings
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Comparative study on the friction behaviour of piston/bore interface technologies | SpringerLink
MX Tech Low Friction Piston Ring
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Amazon.com: Performance Tool W80574 Low Friction Wrinkle Band Piston Installer - Fits 3" to 5" Pistons, Adjust Only Once for All Pistons, Easy to Use : Automotive