Need For Speed ProStreet
50 Achievements
1,000
Xbox 360
Performance Upgrade
Modify a Tier 1 car into a Tier 3 car. Brought to you by K&N – The Original High-Flow Air Filter
10
How to unlock the Performance Upgrade achievement in Need For Speed ProStreet - Definitive Guide
First off buy a Nissan 240 SX and set it to Drag mode then buy a level 2 engine for it and you'll get the achievement
4 Comments
nice! it worked for me!
By Stankami on 22 Jul 2009 02:20
also unlocked horsepower challenge achievement.
By XxjdooksxX on 01 Aug 2010 02:34