Calliper Components. Calliper Remanufacture. Calliper Rebuilding. Brake Caliper Pistons. for Subaru Impreza WRX Front Brake Caliper Seal Rebuild Repair Kit CASTING SEALS. for SUBARU IMPREZA WRX STi 4 pot FRONT Brake Caliper Seal Kit +CAST SEALS 4015S.