Hii

If you belong to general category,you need to get below 5k for admission into aerospace engineering and nearly 8 or 9k for avionics. The entire selection process is purely based on your Jee mains rank and nothing more than that.

Here is the link and you can check the clear cutoffs of past years

https://engineering.careers360.com/articles/iist-btech-cutoff

All the best.