Wilwood puts every effort into developing the most efficient product possible. For that reason, the Forged Dynalite 4-Piston calipers are manufactured from stress-flow forged billet bodies. The process of stress-flow forging realigns the metal's grain structure within the contour of the caliper body. This process eliminates the breaks and interruptions to the internal grain structure that occur when machining a straight block billet. The calipers are also offered in either a black, red, or polished finish.