With more than 85 years of industry leadership, Sunnen has the solution for virtually any precision honing application.

Get precise bore accuracy, geometry, and surface finish for high pressure injectors, lower emissions and better fuel economy.

Get precise bore accuracy and surface finish for higher-pressure hydraulic valves.

Get precise bore geometry and advanced surface finishes for smoother running gears.

Get precise bore geometry and consistent crosshatch for lower emissions, better fuel economy, and reduced oil consumption.

Get precise bore accuracy and advanced surface finishes for lower emissions and greater fuel efficiency.

Get twice the metal removal rate for increased shop throughput.

For more than 85 years Sunnen has been the leader in automotive honing and offers an extensive line of honing machines for connecting rod and cylinder reconditioning and line honing. A Sunnen system can be found in high performance engine building shops as well as production rebuilders.

Get the most complete selection of honing systems in the industry. Sunnen systems offer superior precision, accuracy, speed, finish and ease-of-use for virtually any bore sizing application.