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The more precisely your cylinder head system components interact, the more efficiently your engine runs. MWH has the insight and experience to determine exactly how each component should interact to deliver optimal performance. We focus on large-bore combustion engines (bore diameter range from 150 to 640mm) as well as high performance racing engines to achieve those perfect interactions. MWH offers valves, seat rings, guides, springs, rotators, pre-chamber nozzles, valve cages and more. Both standard and customized components are available.

Valve Spindles Seat Rings Valve Guides
Valve Rotators Kits + Cages Cones + Springs

Manufacturing Sciences


Excellent processes are necessary to produce superior components capable of extending your TBOs. We perform all critical metalworking processes under one roof to achieve the optimal technical properties that meet your high standards. These processes include forging, extruding, friction welding, heat treatment, PTA-/TIG-/MIG-/WIG -welding, flame spraying, induction hardening, PVD coatings, chroming, brazing and more.

Internal research and collaboration with renowned 

research institutes ensures that we remain at the forefront of manufacturing and material sciences, focusing on superalloys and novel coatings. In every product development project, we strive to combine quality, performance and cost-efficiency. Our understanding of metal forming processes, precise machining and coatings allows us to cost effectively design and produce the highest performing products in the industry. Meeting your application’s requirements is our only focus.



As a premium product supplier, quality is forged into our processes and company culture. MWH leverages 160 years of metal working experience, a century of production know-how, 70 years of cylinder head component development and decades of close cooperation with scientific institutions and universities to deliver optimized valve train products for more than 400 engine types.

Employees form the basis of our quality concept. They understand the importance of reliability and understand how their efforts improve your products.

Every component we deliver undergoes an exhaustive series of control steps including visual, optical, dye penetration, ultrasonic and seat welding analysis. We offer component serialization with 100% traceability back to material lots, forging and heat treatment, and manufacturing operations. Quality is not just something we check; it is what we live and breathe. This is why more than 90% of the large engine builders around the world rely on MWH for cylinder head components to deliver the highest level of performance.