I have been reading a lot and trying to decide which way to go and it looks like both LSD's are going to cost around $2680 for either or per:
$2675 for M Performance LSD
http://www.getbmwparts.com/partlocat...subcat1=217025
And
£1681 ($2690) Quaife LSD
http://www.birdsauto.com/quaife/sear...23962&mi=M235i
Which do people prefer? Does the M Performance one void any part of warranty or does it save it? Opinions and recommendations would be great!