The best vehicles to use at Detective Rank 2 is the 5.4L SC V8 coupe; and at Detective Rank 4 the 6.0L V8 coupe. If you use the 6.0L coupe, make sure to take it to a garage and get a street upgrade. Also, if you find one of the bullion vans driving around, hijack one. These will push any car out of the way, and in one hit you can sometimes put a car on black smoke. If you are stuck on the last driving arena mission (one lap around Central Park), just keep hitting her car in this truck to get her stuck for an easy win. The only problem with this vehicle is cornering. Do not be afraid to use this vehicle like a rhino.