Engine Pistons Rings Set with a diameter of 82.00 mm designed for use in engine models F55, F56, G30, 120I, and 220I.This set includes components identified by part numbers 11258657760, 11258678931, 11258618503, and 11258638450.The piston rings are engineered to maintain proper compression and oil control within the engine cylinder.Each ring is manufactured to match specifications for precise fitment and.Suitable for replacement or rebuilding engine assemblies where these specific part numbers are required. Important: This is an independent aftermarket part.Brand/model references serve only to show compatibility.