Wilwood Caliper- DPR-DS - Red 1.25in Piston .38/.500in Rotor - Dust SealDynapro four piston dust seal radial mount calipers (DPR DS) are an example of Wilwoods continuing upgrade and improvement processes. Combine pure race technology with a new generation of Wilwood performance enhancements. The Dynapro DS combines the versatility of radial mounting with a sleek profile, superior strength, and extreme durability in adverse conditions. The addition of dust wiper seals allow this caliper to be used in localities that