Wilwood's newest DynaPro DP6A Calipers combine pure-bred racing technology with contemporary design to deliver superior braking and high-tech style on a wide range of custom, show, and competition vehicles. This newest model in the DynaPro series features a reinforced triple bridge construction, with five high strength steel bridge bolts, making it the strongest and stiffest DP6 caliper ever built. Offers direct interchange with all 5.25†pattern lug mount DynaPro and Dynalite calipers. With Forged aluminum, six piston differential bore body and stainless steel pistons with high temperature seals. DP6A calipers accommodate rotors up to 13â€inch diameter and widths from .38†to 1.10â€. DP6A calipers are available in gloss black or red powder coat, Type III Ano, or Wilwood's Quick-Silver nickel plating.