Hey there.
I want to upgrade rear sway bar only, on my 2007 is250

Ive noticed theres many brands
F sport, ultra, cusco ...

Can someone advise if theres much difference?

Im leaning toward the ultra brand on ebay $280 plus shipping

 

i'm running f-sport f&r and love them.

 

F-Sport and you're done

 

Not much difference in my opinion, especially the rear sway bar its a standard 19mm with any brand

only one I have seen that runs a fairly agressive front sway bar and that is Hotchkis

for the price of the F-Sport, proven quality and craftsman ship...Hotchkis front and rear sway bar kit is on sale

heck if you havent lowered your car they have entire kit, meaning lowering springs and sway bar kit (identical the F-Sport)

all of the options are on sale I might add..

http://www.hotchkis.net/search.html?...mitForm=Search

I personally have installed the hotchkis sway bar kit on my 07 IS350 fitment is bag on and handling has improved very much so over stock...

 

f sport or cusco

 

Until someone actually hacks up each different sway bar to see if there is a bar out there with a thicker tube wall diameter, they are the same. Just get the F-sport set since they're cheapest...$400 :

http://www.ebay.com/itm/LEXUS-IS250-...4215f2&vxp=mtr

 

I know this thread is slightly older, but even though the sway bar set still says its on sale on the hotchkis site, the sway bar set is actually cheaper on figs engineering site.

 

Yep, here's the Hotchkis set ($435) on Figs website :

http://shopfigs.com/v1/index.php?rou...product_id=165

But if you can still get the F-sport bars for $400 with the same specs, why get these? Like my earlier post stated, until someone hacks up each bar and sees the actual tube wall thickness, all the 19mm bars will be the same in our eyes.

 

I haven't done this yet, but it will be the F-Sport sway bars when I do. They will match my F-Sport springs! Ha!

On a serious note, my primary concern with using another brand (especially something off of eBay) would be whether the fitment would correct. You know you won't have to worry about it with the F-Sport bars......

 

I posted just to give more info for people who are shopping around, but another way of looking at it could be "why pay more for the Hotchkis when ordering from their site"?
As a side note, it also supports FIGS who is a vendor here on the forum.

I get what you're saying about the rear bars being about the same. I did notice that the Hotchkis rear bar has another adjustment hole, which some might like. I was interested to read the comment azndriver made about their front bar though:

 

If you were doing just rear bar, you can get the Sikky. The softest setting is equivalent to the F-Sport bar, and it has 2 stiffer settings from there.

 

^Oh yeah, totally forgot about them! I love the custom end links the Sikky unit comes with too!