Notable Indian technologies aboard the Kalvari class include special material forgings from Flash Forge India, critical diving components and weapons handling machinery from SEC Industries, command consoles from HBL Power Systems steel, cables and other accessories. In future, they'll be fitted with DRDO developed phosphoric acid fuel cell air-independent propulsion during their first refit scheduled in 2024
Indian contribution to Su-30MKI avionics (developed under project Ventrivale) include DARE MC-486 and DP-30MK mission computer/display processor; DARE RC1 and RC2 radar computer; DAR Tarang Mk 2 RWR and high-accuracy direction-finding module; IFF-1410A IFF; HAL INCOM 1210A integrated communication suite; HAL RAM-1701 radar altimeter; and LRDE programmable signal processor. Avionics systems from various countries integrated by Ramenskoye RPKB.