Performance Online has introduced a newly designed Power Brake Booster Kit for '65-'66 and '67-'70 Mustangs. Available for both factory drum and disc brake applications, POL's power booster mounts in the factory location. A must when upgrading to disc brakes, the booster comes assembled and ready to install. Kits include a 7-inch ('65-'66) or 9-inch ('67-'70) single diaphragm power booster, mounting brackets, master cylinder, and proportioning valve (disc applications only). Notes: Works with automatics only; 67-'70 booster requires a brake pedal (sold separately).