2010 got the lsd. 2011 and up got the upgraded suspension. 2012 got a bit wider wheels.

 

lol I thought limited slip differential was more geared towards off roading, like it puts power in the wheel thats on the ground in place of any wheels that are in the air, in that case, I wouldn't really need that..?

 

If you are not going to modify the IS F, the 2010 added the LSD and 2011 and then 2012 got revised suspensions which really work.
If you are going to modify the IS F, well I would get an older model.

I did a recent review on the IS F 2012 and it was sensational, it drove much better than the 2008. The V-8 sounds great and pulls hard. However the car is very old in its life cycle and the new Lexus models are simply better put together with more tech than the older models. I have no idea how the 2014 IS F-sport will drive but if its anything like our GS F-sport you are in for a treat.

 

Yea I wasnt really planning on modding it, I don't really know much about them, but many of them seem to have a downside, like the easy cold air intake mod which supposedly making it easier for dirt to get into your engine. If I were to make a mod or two on an is-f which would you think would be the most worthwhile?

 

for cornering, wheels will try running at different speeds (i guess similar to one wheel being up) and LSD keeps that in check.