To unlock this trophy you need to equip you car with a top performance item in each category. These parts are the ones with an "E" mark on and are generally the last parts you unlock in each category.
To unlock these parts you need to hit two requirements.
1) You need to be level 50 and so unlock this trophy:
2) You need to have completed the story missions for Amy, these are the purple build missions. The last mission for Amy unlocks:
Once you have unlocked all the high end parts just purchase and equip them to your car. If you're short of funds sell any spare cars you have. I found the trophy unlocked when I exited the garage.