The features of the mod apk are list as follows- Infinite Coins, Infinite Cash, No damage (for who has money on his account), All cars unlock, 50 % discount in-car upgrade and purchasing, Car will start with 5 bars of nitro instead of 2, Cars will be very fast so you can win the race easily, All mini ranks complete, Best rank unlock (not really because I don't know her but if you win all races it will count as the best rank).
All trophies won, Unlimited fuel car not going to explode or anything like that after the race is finishe. It also enables you to visit different locations around the world while taking on tough challenges along the way.