Piston-rings.eu
Offers piston rings for vehicles and industrial engines. Includes product catalogue and company profile.
http://www.piston-rings.eu

Franklin Aircraft Engines, Inc.
Franklin Aircraft Engines - Your source for new Franklin engines, new Franklin parts, and information
http://www.franklinengines.com/

Start Pac
Offers aircraft, locomotive and mining maintenance equipment including power supplies, ground power unit (GPU), gas turbine start up, and portable battery packs.
http://www.startpac.com/

Unison Industries
Home page for www.unisonindustries.com.
http://www.unisonindustries.com/

Textron Lycoming
Major manufacturer of general aviation piston engines.
http://www.lycoming.textron.com/

Bergner Metalurgica
Manufacturer of compressor (piston type) spare parts: Valves, piston rod packings, scraper rings, PTFE piston rings, for Ateliers Francois, ABC, Belliss and Morcom and other compressors.
http://www.bergner.com.ar/

Cross Manufacturing Company Ltd
UK based manufacturers of brush seals and piston rings. Established in 1938, the company have an established pedigree in producing durable high performance products
http://www.crossmanufacturing.com/

EPI, Inc.
Propulsion System Technology and Components for Aircraft, Automotive, Marine and Industrial Applications
http://www.epi-eng.com

SM Schoettle
Original equipment supplier for German engines. Manufacturers valves, piston rings, guides and other products.
http://www.sm-germany.com/

Mau Enterprises
Patented innovative design with that eliminates the main drawbacks associated with a reciprocating piston engines. Includes drawings and animations.
http://www.mauenterprises.com/