I've had both, and I lost torque on the bottom end with the AA.
Originally Posted by RPIpower
If I had to choose between the two, I would go with one or the other for different reasons. Gintani uses some nice parts and I believe they are made here in the US. AA has their systems imported but they do have more experience in the BMW market.
This is the kind of thing that cracks me up about these forums. You havent tested either side by side so how can you come up with these type of comments. IMHO, the forums need to stop this BS where one person says something and then it becomes a "fact". Can you analyze both and tell us all why one is better than the other as far as performance goes?