If you doing B-Spec, you should get a free random X1 when u reach lvl 35 but in A-Spec lvl 40 is required and you need to purchase it with 20 mil crs instead..no free X1 for A-Spec.
Some calculation for those who are at lvl 25 above..Every lvl it adds 200k XP challenge to the existing challenge.
At lvl 28 > 29 = 500k
lvl 29 > 30 = 750k
So if one would want to reach lvl 30 > 31, they need to complete 1 mil XP.
From lvl 31 to 35 would be 2 mil XP.
Lvl 36 to 40 would be 3 mil XP.
So in total, 6 mil XP to collect if you wanna rech lvl 40 from lvl 30 in A-Spec while 3 mil XP for B-Spec from lvl 30-35.
Grinding Indy 500 would take 24 rounds to earn those XP for A-Spec players.
Ouch..that's painful work.