You can not get admission in BITS through JEE Mains, you will have to appear for BITSAT to get admission in any BITS campuses.

All the very best and good luck.

Hello Shobhit! BITS Pilani is a private institution which takes in students based purely on merit in BITSAT Exam which is held about around the same time as JEE ADVANCED. No matter how much you score in JEE MAINS or JEE ADVANCED if your score in BITSAT is less you wont be taken in. Hope this helps.