Actually the FMIC found on my car is not from Hahns. It was custom made by Extreme Motorsports about 5 years ago.
A couple of notes about FMIC's now that I know more than I did then...
1) Normally FMIC's with the inlet and outlet on the same side suffer a tad in the efficiency department. FMIC's w/ the inlet and outlet on the opposite sides have less pressure drop and are more effective.
2) Length of piping has a direct effect on perceived lag of the turbo. The shorter the piping, the more responsive your turbo will be.
3) Sharp bends can negatively effect turbo response.
4) Couplers should not be used to make up bends. As much as possible, use only straight couplers.