 The carrier for the 2S4 was a dedicated tracked chassis also used with the 2K11 Krug TEL vehicle, and later used as the chassis for the 2S3 'Akatsiya' and 2S5 'Giatsint' self-propelled guns.Having carried out necessary modifications, this vehicle was designated Object 305.It's powered by 12-cylinder "V"-layout W-54 engine.