Originally Posted by xi330
I have a 2006 e90 330xi sport and was thinking about the AA tune and know next-to-nothing about the mechanical components of cars. If there are not any other mods on the car is the AA worth it? Is the addition of a K&N airfilter recommended/ necessary?
Went with the OE tune by MM in Gilbertsville, PA with addition of K&N filter system and must say it is exactly what I wanted. After a great 100k of standard power, it is like a brand new car with an undeniable power increase. It makes my daily 100 mile back road commute immensely more enjoyable; where I have been finding that second, third and fourth gear are other car quick. Gas mileage has remained the same and in general the car is simply...optimized.