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ECU upgrades in Need for Speed: Underground 2 can be applied to increase acceleration and top speed.

The effectiveness of an individual part is dependent on the package they are included in;

  • Street - Low increase of acceleration and top speed
  • Pro - Moderate increase of acceleration and top speed
  • Extreme - High increase of acceleration and top speed
  • Unique - Increases stock acceleration and top speed without adding new parts

Upgrades

Package Part Price Unlock
Street Fuel Filter 250 Available from the beginning of the game
Street Fuel Pressure Regulator 250 Available from the beginning of the game
Street Fuel Rail 250 Available from the beginning of the game
Street Remove Top Speed Limiter 250 Available from the beginning of the game
Pro High Flow Fuel Pump 500 Win 7 races during Stage 3 of the career mode
Pro Performance Chip 1,000 Win 7 races during Stage 3 of the career mode
Extreme Engine Management Unit 7,000 Win 16 races during Stage 4 of the career mode
Extreme Fuel Injectors 1,000 Win 16 races during Stage 4 of the career mode
Unique - - Win 9 Outrun races during Stage 4 of the career mode

Incompatible Upgrades

  • Performance Chip - Engine Management Unit

Notes

  • Minimum and maximum torque distributions can be adjusted in the Performance Tuning menu.

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