5 Best Cars to Customize in GTA Online These are the 5 best cars to customize in GTA Online. The Karin Sultan RS Classic, which costs nearly $1.8 million which is a steep price to pay for an unholy crossbreed of a Subaru Impreza and a Mitsubishi Evo, however, the customization options you get are simply off the charts. Then there’s the Overflod Entity MT, which is a hypercar and not a tuner, but there’s still a surprising amount of customization on offer here, including one that lets you drive a