НПО Энергомаш
Not only had Yuzhnoye mastered the most complex cycle for the propellant (oxidizer rich staged combustion cycle) with the RD-8, but they had worked closely with NPO Energomash during the RD-120 program. The manufacturing is done at its sister company of Yuzhmash in Ukraine, and the RD-120 thrust augmentation project of 2001 to 2003 had been a mixed project between the three companies.