==== Which 3 Unique Upgrades (TJ parts) are the best? ====
The three most effective TJ setups for NFS Underground, especially in Circuit and Free Run mode, are:

|Engine|ECU|Turbo|->|the strongest option, but slightly less stable and a bit harder to handle. |
|Engine|Turbo|Weight|->|slightly less power, but easier to control and more stable. |
|Engine|ECU|Weight|->|similar to Engine-Turbo-Weight in handling and stability. |

Try all three and choose the one that feels best for you - you really can’t go wrong with any of them. \\ 
You can always change the TJ combination in the NFS.onl launcher under **Options → Saved game files**, as long as the game is not running with that profile loaded.

=== All Upgrades ===
^Code^Upgrade^Short Name^
|''ENG''|Engine Exhaust Package|Engine|
|''TRN''|Drivetrain Package|Trans (for Transmission)|
|''TIR''|Tyres|Tires|
|''ECU''|E.C.U. & Fuel System|ECU (for Electronic Control Unit)|
|''TRB''|Turbo Package|Turbo|
|''BRK''|Brake Kits|Brakes|
|''WGT''|Weight Reduction Kits|Weight|
|''SUS''|Suspension Package|Suspension|
|''NOS''|Nitrous Oxide Package|NOS or Nitro|