Okay, this is a personal opionion, but for $1000 (less then actually).
Even better then my turbo upgrade.
BRAKES!!
DBA slotted crossdrilled rotors, EBC GreenStuff Pads, and steel braided brakelines.
I rate it better then the turbo because its saved my arse so many times, and its safety. Safety is always a good upgrade. It was easy and took me about an hour to do the hole thing and unlike the turbo I didn´t have any probs. Although I dont have the steel braided brakelines yet, and they will take longer to install. But still....my opinion on best upgrade.
Even better then my turbo upgrade.
BRAKES!!
DBA slotted crossdrilled rotors, EBC GreenStuff Pads, and steel braided brakelines.
I rate it better then the turbo because its saved my arse so many times, and its safety. Safety is always a good upgrade. It was easy and took me about an hour to do the hole thing and unlike the turbo I didn´t have any probs. Although I dont have the steel braided brakelines yet, and they will take longer to install. But still....my opinion on best upgrade.