This 4-piece piston and rings set is designed for 2.0L L4 gas DOHC engines found in select Fusion, Escape, MKC, and MKZ vehicles from model years 2015 to 2018.Constructed from materials, the pistons support stable engine.The rings are engineered to reduce friction and help maintain combustion efficiency for consistent function.This set matches standard dimensional and functional specifications and corresponds to OEM reference numbers FB5Z-6108-A, K2GZ-6148-B, and AG9Z-6135-B, making it suitable as a direct replacement for worn or damaged components.It is compatible with the specified vehicle applications and supports effective engine rebuilding for maintenance or repair purposes.Suitable for use by professional technicians and experienced DIY mechanics.