Headway Performance
- Remanufacturing of cylinder heads. Includes company profile and capability overview.
- http://www.headwayperformance.net

Jinninge Enterprise Co., Ltd.
- Manufacturer of motorbike cam shafts, automobile camshafts, shift fork, gasoline and diesel engine parts, shift gear drums and rocker arms. From Taiwan.
- http://www.camshaft.com.tw/

Moonrise Industries
- Manufacturer of cylinder heads for European truck and diesel engines. Includes product overview and company profile. [English, French, German]
- http://www.cylinderheadindia.com/

Mechadyne International
- Developer of valvetrain systems for internal combustion engines. Includes product overview and company profile.
- http://www.mechadyne-int.com/

Nextech Engineering
- Manufacturer and exporter of intake and exhaust valves. Include product overview, capabilities and company profile.
- http://www.nextechengg.com

Louthan Competition
- Rebuilds engine cylinder heads for stock or racing vehicles. Includes pricing schedules, technical information and photo gallery.
- http://www.performancecylinderheads.com/

Vespark Industrial Co., Ltd.
- Manufactures glow plugs for diesel engines.
- http://www.vsp-glowplug.com.tw/

VEGE
- Remanufacturer of cylinder heads. Includes company profile with international sale offices and facilities.
- http://www.vege.nl

Tetik
- Manufacturer of valves, guides and seat inserts for internal combustion engines. Includes company profile and product overview.
- http://www.tetik.com

Spesso
- Manufacturer of flat gaskets and joints for OEM and aftermarket applications. Includes product overview and catalogue.[English, French, Italian, Spanish, German]
- http://www.spesso.com

Sino Spark Plugs
- Manufacturer of spark plugs. Includes company profile and product overview.
- http://www.sinosparkplugs.com

Sanmati Exports
- Manufacturer and exporter of valves, guides, tappet and valve seats. Includes company profile and product overview.
- http://www.sanmatiexports.com

Precision Engine Parts
- Manufacturer of bronze valve guides and valve train components. Includes company profile.
- http://www.precisionengineparts.com/

Piper Cams
- Manufactures performance camshaft and exhaust manufacturer.
- http://www.pipercams.co.uk

Performance Springs Pty Ltd
- Manufacturer of engine valve springs and retainers. From Australia.
- http://www.performancesprings.com.au/

Oygarsan Tappet Ltd.
- Manufactures valve tappets for oem. From Turkey.
- http://oygarsan.com/

Newman Cams
- Manufacturer of automotive camshaft systems for motorcycles, automotive and industrial engines. Includes product catalogue and company information.
- http://www.newman-cams.com

National Cylinder Head Exchange
- Remanufacturer of cylinder heads for all vehicles and marine applications.
- http://www.nationalcylinderhead.com

Märkisches Werk Halver
- Manufacturer of cylinder head components for two stroke and four stroke engines. Includes product overview and company profile.
- http://www.mwh.de/

L.E. Jones Company
- Manufacturer of valve seat inserts for the diesel and automotive industry. Includes technical information and company profile.
- http://www.lejones.com/

Hoga Industry
- Production and sale of valves, guides and seats. Includes company profile and product overview.
- http://www.jcmc.com.tw/

G&S Valves Ltd.
- Manufacturer of valves for engine development, up to ongoing scheduled contracts for larger companies.
- http://www.gsvalves.co.uk/

Durovalves
- Manufacturer of valves, pins and related equipment as per requirement. Includes company profile and product overview. [India]
- http://www.durovalves.com

Crane Cams
- Manufacturer of camshafts and valvetrain components. Includes product overview, company profile and list of retailers.
- http://www.cranecams.com/

Cal Valves
- Remanufacturer of engine valves for diesel, industrial and automotive engines. Includes product overview, catalogue and company profile.
- http://www.calvalves.com

American Custom Cam
- Manufacturer of custom camshaft grinding for all types of applications. Includes company profile and capabilities.
- http://www.americancustomcam.com

Ameera Exports
- Manufacturer of valves, rockers and related equipment. Includes company profile, product and application overview.
- http://www.ameeraexports.com

Airflow Research (AFR)
- Manufacturer and designer of cylinder heads, with flow dynamics simulation capability. Includes company profile and product overview.
- http://www.airflowresearch.com/