if you go into an active blueprint and select tune car then you can do just that but the most useful thing is to tune everything in your engine on full it can add about 30hp+ to your car
step 1:use the cheat 'unlockallthings'step 2:go to main menustep 3:load your career againstep 4:go to garage, there will be 4 more carsstep 5:sell all of them,you will get 90,000$step 6:save gamestep...
i completely dominated every drag race in my 1060 hp Toyota supra it is honestly the best drag car you can buy if you've got a spare $100,000 you can get it up to 900hp+ I would say the Dodge Charger...