Compare Maximum number of 4 items selected TRW Chassis TRW Brake Booster - PSA521 Part #: PSA521 Line: TRW TRW Chassis TRW Brake Booster 1 Year Limited Warranty Hardware Included: No Bracket Included: No Master Cylinder Included: No Gasket Or Seal Included: Yes Booster Type: Vacuum Neck Seal Included: Yes Brake Booster Diaphragm Style: Single Diaphragm Diameter (mm): 270mm Brake Booster Material: Steel Show More Show Less