It has a new turret with floor, PAZ nuclear-blast protection and over-pressure NBC system, gamma ray detector, improved V-55 engine developing 580 horsepower (the engine output was boosted by increasing both pressure of injected fuel and degree of compression) and power-assisted clutch, MC-1 internal oil filter, AK-150S compressor which allows pneumatic start of the engine (the electric starter was removed), new internal fuel tanks with a capacity of 300 l situated in the front of the hull (this increased the overall capacity of the internal fuel tanks to 680 l), ammunition load for the main gun was increased from 34 rounds to 43 (18 of which are stored in "wet containers" situated inside the hull fuel tanks), "Rosa" fire-protection system and TDA exhaust smoke generator.