AP03 3x Piston Set STD with Piston Rings CM5Z6148C for 1.0 Fiesta Focus Mondeo STD 71.90 mm bore diameter.This piston set is designed for replacement in compatible engines.Each set includes three pistons and corresponding piston rings, sized for standard bore applications.The components are engineered to meet specifications for fit and function.Suitable for use in engine rebuilds where standard size pistons are required. Disclaimer: This is a compatible third-party part.Brand/model citations are solely for compatibility guidance.