Originally Posted by vgame64
I think by far this is the product most of us want from BMW performance, what would everyone interested in it consider a decent price?
The cost, quality, and professional installation are certainly serious considerations. The cost is difficult to guess right now, since the installation of an LSD on late issues of 3-series requires re-machining of the existing parts in order to install an aftermarket LSD. If machining is not done competently, the installation may lead to problems later on. Clearly, engineering skills of BMW would be preferred here, as being more reliable and allowing the modified car to stay under warranty.