It sounds like you're referring to Need for Speed: Most Wanted (the 2005 classic or the 2012 version) and looking for a save editor that can unlock all cars, often advertised with terms like "extra quality" (likely meaning fully upgraded, blacklist cars, or bonus vinyls).
Benefits of Using a Save Editor
100% Completion Save Files: For the fastest "high quality" experience, downloading a verified 100% save file (like the Boya save) will give you a profile with all 15 Blacklist cars, the BMW M3 GTR, and bonus cars already in your garage. Implementation Guide nfs most wanted save editor unlock all cars extra quality
The standard progression system of Most Wanted is intrinsically tied to its narrative. The player, betrayed and stripped of their BMW M3 GTR, must climb a blacklist of fifteen racers to reclaim their status. While this structure provides a compelling narrative arc, it inherently restricts the player. The vast garage of the game—featuring icons like the Porsche Carrera GT, the Lamborghini Murciélago, and the Chevrolet Corvette C6—is locked behind hours of gameplay. For a player who has already completed this journey multiple times, or for those who wish to bypass the grinding aspect entirely, the Save Editor becomes a key to the city. By manipulating the game’s save file, these tools instantly grant access to the full roster of vehicles, transforming the experience from a rags-to-riches story into a sandbox of automotive fantasy. It sounds like you're referring to Need for
Junkman Save Editor: A standalone tool for the 2005 version that edits Junkman parts, money, and garage builds directly. Available on Nexus Mods. Reason: Some traffic cars do not have collision