The Wilwood Dynapro ST DP caliper is a 1.38 piston model with a .81" rotor listed under the ST family, which includes Thermlock pistons for improved heat control. It offers a compact, bridged caliper layout that helps manage heat transfer to fluid and seals, suited to installations where reduced thermal load and reliable braking are desired.
Wilwood ST DP Caliper 1.38 .81 Rotor Ano