One of the pre-order bonuses [you can also get it as DLC] for MAFIA II which brings vehicles and outfits for Vito based on the theme of Las Vegas. It adds a Cowboy outfit and a Gambler-like outfit for Vito. It looks nice. (these outfits without the DLC are NOT in the game.)
PC System Analysis For Mafia 2: Vegas Pack Requirements
To run Mafia 2: Vegas Pack on high graphics settings your PC will require at least a 0MB GeForce GT 240 / Radeon HD 2900 Pro with a Pentium Dual Core E5500 2.8GHz or Phenom II X2 550 Black Edition CPU. For your PC to completely meet the recommended requirements you will also need 2 GB system memory.