Revamping of the 1A/1M cat cracker with introduction of new technologies and equipment units is described: feedstock and sludge nozzles, single-stage reactor cyclones, two-stage catalyst stripping, air- and steam-distributing devices, and two-stage regenerator cyclones. The output of the unit increased by 40%, and the yield and octane characteristics of the naphtha cut increased as a result, and grounds were created for converting the unit to a two-year operating cycle between repairs.