Racing Dynamics carbon fiber engine covers are made by a dry process rather than the normal wet process that many small shops utilize. Many people do not realize that the carbon fiber product they are purchasing is not entirely carbon fiber. True carbon fiber is made in a pre-preg and dry process that consists of vacuum forming sheets of carbon fiber to form into a strong and lightweight composite, like most racecar parts. On the other hand, using hand laid carbon fiber sheets into a mold then mixed with resin forms wet carbon fiber. This process generally allows air pockets to form in the material and other small defects. This makes wet carbon fiber structure weak and also is susceptible to changes in temperature dependant on the manufacturer. You can usually notice the difference between wet and dry carbon fiber by looking at the surface of the material. Dry carbon fiber surfaces are smooth and show no air bubbles. In contrast, wet carbon fiber is wavy and air bubbles are noticeable. Because of the molding process, dry carbon costs more to produce than wet, however, since wet carbon fiber looses it’s durability over time, dry carbon is the best for the long term. Each set comes complete with billet aluminum mounting hardware and the Racing Dynamics logo in silver molded directly into the valve cover piece.