a wild pooch as following...

why cannot we replace Tejas's single engine with 2 X Indigenous engines (i.e Kaveri Dry or HTFE-25 or HTFE-40) development of which is in good shape?

current Tejas engine= 1 × GE 404F2/J-IN20 turbofan, 53.9 kN (12,100 lbf) thrust dry, 90 kN (20,200 lbf) with afterburner

1 X Kaveri dry= 11,700 lbf (52 kN) thrust each dry

1 X HTFE-25 and 40 has 25kN and 40kN thrust respectively

consider following example from USAF

F-5 tiger used 2 × General Electric J85-GE-21 afterburning turbojet engines, 3,500 lbf (16 kN) thrust each dry, 5,000 lbf (22 kN) with afterburner

F-20 tigershark used 1 × General Electric F404-GE-100 afterburning turbofan engine, 11,000 lbf (49 kN) thrust dry, 17,700 lbf (79 kN) with afterburner