My Cobb 2 cents
I installed S1 Agressive in June and havent looked back..been a pretty impessive car to drive. Now, I am taking my car tomorrow for battery change, so I uninsalled and flashed original curves. That alone (ease of installing/uninstalling) makes it worth every penny. But what blew me away was the difference I noticed now that the S1 Aggressive curve has been uninstalled. This car is a dog, now this is relative of course. Its just interesting that I noticed the amazing impact of COBB after uninstalling..I cant wait for new battery so I can go back to COBB.
Go COBB and dont look back
2008 535xi, Monaco Blue
PREMIUM, NAV, SPORT, COMFORT ACCESS, COLD PKG, PARK ASSIST, SAT, COBB S1 Agg.