Airflow Research (AFR) - Manufacturer and designer of cylinder heads, with flow dynamics simulation capability. Includes company profile and product overview. Ameera Exports - Manufacturer of valves, rockers and related equipment. Includes company profile, product and application overview. Cal Valves - Remanufacturer of engine valves for diesel, industrial and automotive engines. Includes product overview, catalogue and company profile. Crane Cams - Manufacturer of camshafts and valvetrain components. Includes product overview, company profile and list of retailers. G&S Valves Ltd. - Manufacturer of valves for engine development, up to ongoing scheduled contracts for larger companies. Hoga Industry - Production and sale of valves, guides and seats. Includes company profile and product overview. L.E. Jones Company - Manufacturer of valve seat inserts for the diesel and automotive industry. Includes technical information and company profile. Märkisches Werk Halver - Manufacturer of cylinder head components for two stroke and four stroke engines. Includes product overview and company profile. National Cylinder Head Exchange - Remanufacturer of cylinder heads for all vehicles and marine applications. Newman Cams - Manufacturer of automotive camshaft systems for motorcycles, automotive and industrial engines. Includes product catalogue and company information. Oygarsan Tappet Ltd. - Manufactures valve tappets for oem. From Turkey. Performance Springs Pty Ltd - Manufacturer of engine valve springs and retainers. From Australia. Piper Cams - Manufactures performance camshaft and exhaust manufacturer. Precision Engine Parts - Manufacturer of bronze valve guides and valve train components. Includes company profile. Sanmati Exports - Manufacturer and exporter of valves, guides, tappet and valve seats. Includes company profile and product overview. Sino Spark Plugs - Manufacturer of spark plugs. Includes company profile and product overview. Spesso - Manufacturer of flat gaskets and joints for OEM and aftermarket applications. Includes product overview and catalogue.[English, French, Italian, Spanish, German] VEGE - Remanufacturer of cylinder heads. Includes company profile with international sale offices and facilities. Nextech Engineering - Manufacturer and exporter of intake and exhaust valves. Include product overview, capabilities and company profile. Mechadyne International - Developer of valvetrain systems for internal combustion engines. Includes product overview and company profile.