Dynamometer Driveshafts are available for both gasoline and diesel engine-testing applications. These rugged assemblies are available in standard lengths, that fit our existing line of docking stations and conventional engine stand dynamometer frames, or in special configurations – for custom applications. Each driveshaft is dynamically balanced, for smoother high-rpm running, and includes heavy-duty U-joints. Most models include internal sound deadening for quieter operation (e.g. less rattling during low-load testing).