Abstract: Connecting rods are becoming on increasingly high volume market for the powder metallurgy industry. At present the Components are powder forged. Many efforts have been made recently to develop a single-sintered Connecting rod. Within the scope of the European Community's COST 503 program,two cooperative projects were undertaken with Swedish,British and German partners,with the aim of developing single-sintered and weight-optimized connecting rods for relialble operation in 1.8 to 2.0 litre automotive engies. The fatigue strength behaviour obtained with single-sintered connecting rods is equivalent to that of the present used optimized cast connecting rods. The performed engine test runs proved that reliable operation is assured.