)FIRST OPEN STREETRACING RIVALS AND STAY IN THE LOBBY.

2)OPEN CHARLES.

3)IN THAT LOCATE FOR http://www.streetracerivals.com AND EXPAND IT.

4)NOW GO BACK TO GAME AND SELECT EASY MONEY RACE AND SELECT THE EASIEST RACER AND RACE.

5)AFTER FINISHING RACE ,DONT CLICK CONTINUE,INSTEAD GO TO CHARLES AND CLICK http://www.streetracerivals.com AND EXPAND IT.

6)THEN http://www.streetracerivals.com > DATA > gateway.php?qID=1384709203686(Race.setResult).

​7)THEN OPEN REQUEST SECTION AND CLICK EDIT.

THEN EDIT pl_topspeed to 100.56,pl_perfGear to 10000000,pl_goodGear to 1000000.THEN CLICK EXECUTE.

9)NOW GO BACK TO GAME AND CLICK CONTINUE AND IN THE LOBBY YOU CAN SEE THAT YOUR CASH AMOUNT HAVE CHANGED.
For Car cheat u need also Charles 
1) Open Charles and go to your garage and click car shop
2) Then breakpoint the  http://www.streetracerivals.com and buy the first car and wait for breakpoint.
3)Then when breakpoint you should change the Card id to the car u want and execute and u have car.
Credits go diamond818.
 

The id of the nicest car "The Beast" is 53

I believe the cash hack has been patched, and I'm pretty sure the car hack is dead too. Last time I tried it, I received an error like "Not Enough Cash", as if it were applying the correct value for the car, and not being bypassed by this ID hack.