DynaPro four piston radial mount calipers combine pure race technology with a new generation of Wilwood performance enhancements. The DynaPro combines the versatility of radial mounting with a sleek profile, superior strength, and extreme durability in adverse conditions. With an overall weight as light from just 3.58 pounds, the DynaPro has become a favored choice for a broad range of sports, rally, and off-road driving applications.Stainless steel pistons with dust seals make the calipers ideal for street and competition useStrong and stiff construction for reduced flex and improved braking performanceAvailable to suit rotors (discs) from 10.75 to 12.19" (273-310mm) diameter and from 0.50 to 1.10" (13-28mm) thick (check table below for compatibility)Range of piston sizes to allow calipers to be matched to brake system requirementsThe strength of the DynaPro is a combination of process and design. The process of stess-flow forging re-aligns the internal grain structure of the metal to