No Golfs have ever come with a limited slip diff from the factory apart from the Mk7 which has a quasi electro-mechanical LSD.
On the Mk6 you could specify an electronic diff called XDS this is also something you can enable with VCDS. I've been playing around with it lately with good results.
Disagree but there you go!
A diff before more power is the point i was getting at mate although still say over 200bhp is waste of time/money in fwd car
Been there and done it with a 320bhp mk1 focus Rs and ruined the car im affraid
That's because it was a Ford focus.
The focus RS mk1 diff was terrible to live with, well known. Great car but as a daily driver on cambered roads, it's a pain!!
Diff's have moved on.
Mk5 platform can handle the power very well and you don't really need a diff unless you are going above Stage 2 levels of power. Arguably with an Edition 30 then at a Stage 1 you would see some benefit if you drive the car very hard but on the road for normal use it's not that imporant. Throttles are modular after all ;)