AE86 rear suspension options 2018

[Alex]

Excellent, didn't hope for exact codes Thanks! I will check prices with local distributors.

I have new 6kg springs for front coilover, so I just need new rear springs rated at cca 4.3kg to have proper balance. It maybe good time to update whole suspension with lower rate springs.
6kg is too stiff for rear Bilsteins (from Saab); Do you know if its ok with front Bilsteins (from VW GTI) to have 6kg springs? Unfortunately, we don't have specialists in my surroundings, so I'm pretty much stuck with what I buy initially.

Suggestions for rear 4.3 springs? AJPS? MCNSport? Someone else?
Did anyone try MCNsport inserts and rear coilovers? https://www.mcnsport.com/collections/d-m...hortstroke