In a standard career, these parts are rare rewards found in "Unique Performance Upgrade" markers after defeating Blacklist racers. The Limitation:
Editors can "tick" a box to unlock all Junkman parts for "My Cars" mode or directly inject them into your Career save. The "Back Room": nfs+mw+junkman+editor
It's a tool for freedom and creativity. You can build the fastest car in the game, experiment with all the visual options, or build a fleet of unique vehicles for your Career garage. It turns the late-game experience from a grind into a sandbox, allowing you to enjoy the game's fantastic driving mechanics without arbitrary limitations. In a standard career, these parts are rare
The Junkman Editor is more than just a save editor; it's a comprehensive suite for customization: You can build the fastest car in the
Given the combination, here are a few speculative interpretations:
Apply Junkman parts to all cars in your garage, not just one.