2 Cars
Keep 2 Cars.
One car for racing and the other car for pursuits, that way your pursuit car will have a high heat level to make your bounty go higher quicker. And your racing car will have a low heat level to make sure it dosent get hard to evade if you do get in a pursuit with that car.
More tricks, tips and cheats for this game are right here - Need for Speed: Most Wanted cheats
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