Click File > Save (not 'Save As'). Overwrite the original file. Launch NFS: Most Wanted. Load your profile. Drive to the highway and engage nitrous. Prepare for warp speed.
Click "Load Save." Navigate to the "Garage" or "Inventory" tab within the editor. You will see a list of every part type (Engine, Transmission, Tires, etc.). nfs+mw+junkman+editor
Junkman parts do not just add a few horsepower; they fundamentally break the game's physics engine. Click File > Save (not 'Save As')
The Catch: You were never supposed to have them. The only way to legitimately obtain Junkman parts in vanilla gameplay was via rare, buggy "Black Edition" lotteries or specific USB save transfers. For PC players, the solution is the NFS MW Junkman Editor. The Catch: You were never supposed to have them
This is why the editor is famous. Standard gameplay only allows one Junkman part per category. The editor allows duplication. To stack: