Hey guys with the 335i
http://www.activeautowerke.com/viewp...x?id=Product73
This is the best in my opinion as it acts like an AEM standalone. With this you can mod your car however you want and just program the ECU with a laptop. Gives you the potential to add mods as you go and even go balistic with hp down the road for future mods.

AA has a great track record and customer service.
your car is an 05 so it should be in the 410-430 range stock!
you have ASP (180mm)big *** pully thats suposed to give an additional 35-50 whp no?
Dude go get your car checked out, by people who know what they are doing!




I have no idea whats wrong with the car...