[3][4][5][6][7][8] It is manufactured and assembled by Turkish Land Forces at the 1010th Army Equipment Repair Factory using imported subsystems from Korea.

[5][9][10][11][12][13][14] It has an ongoing upgrade project dubbed as T-155 Fırtına II, possibly changing its engine to Turkish origin to avoid Germany's restriction on Turkey's defence sales.

The T-155 retains most of the K9's features, such as the CN98 155 mm barrel and chassis, produced through the technology transfer of Agency for Defense Development (ADD) in South Korea.

[3] However, its turret reflects original Turkish design that increases magazine capacity from 24 to 30 while decreasing hull ammunition storage from 24 to 18.

[25] The new generation model dubbed "Firtina 2" was to begin production in 2017, featuring improvement to range and rate of fire.