Hi! I just noticed that people just keep on tuning FFs like Honda Civics , EGs and none of the FR series like BMW and Mercedes. Isn't it more rewarding to have a powerful , quick BMW rather than a domestic tuned FF?
bmw tuning is a large, very profitable industry worldwide. there's just much less of them on the road, hence the law of averages tells you that you'll see much less of a market for bmw tuners than, say, honda tuners.
do a google search and you'll find at least 5-6 large, reputable companies that do great business tuning exclusively bmw's.
two more things -
1. bmw's are more complex machines, so the price of entry for companies is higher.
2. because of #1, tuning is much more expensive, therefore making the price of entry for owners higher as well.
And for a fact that BMWs are already good cars by themselves; they handle well, have near neutral weight distribution, and inspire confidence in the driver as they are from the factory. So others will not anymore try to modify it because it already is good enough for most.