piran21

Assuming that the 2014 IS-F was the best overall handling/feeling iteration. I know that the 2011 was a huge improvement over the 2008 car.

For those of us with pre-2011 cars, what parts are required to get to 2014 OEM spec?
Shocks & Springs & Power Steering ECU?

Did any of the suspension arms change in geometry, bushings, links etc?

I do apologize if this has been discussed ad nauseum.

avgj0F

iTrader: (2)

I upgraded to 2012 springs, shocks and bump stops back in December. Time will tell but it rides much better than original set up. Less bouncy and more compliance.

kzlflash

iTrader: (1)

While we're on the same subject, does anyone know why there are so many front spring variants listed in the 2011 parts diagram?

4813153330 - variant for 2011
4813153250 - variant for 2008-2011
4813153360 - variant for 2011 and 2012

Anyone know why, and whether there are any differences between the three?

Source:
http://www.lexussouthatlantaparts.co...driveLine=8093

lobuxracer

iTrader: (2)

The IS F went through a number of iterations in the suspension department. It started with Tokico and ended up with Sachs, and I believe there was another manufacturer in the middle. From all reports, the Sachs units were "best" (whatever that means because best is a relative term based on a set of success criteria which may or may not be what an individual wants). So the different spring options don't seem to be odd at all. Lexus did quite a bit of beta testing with IS F owners.