Anyone try an ISF front sway bar on an IS350?
03-18-16, 05:31 AM
#1
Anyone try an ISF front sway bar on an IS350?
The ISF front sway bar is supposed to be the same width as the F Sport sway bar. Only difference I believe is less compliant bushings.
Since it's no longer possible to just order the front F Sport sway by itself, I'm curious if anyone has tried an OEM ISF front sway on an IS350? If so, any fitment issues? Also, what were your driving impressions?
I already have the rear f-sport sway so buying another set just to get the front is too much hassle.
Since it's no longer possible to just order the front F Sport sway by itself, I'm curious if anyone has tried an OEM ISF front sway on an IS350? If so, any fitment issues? Also, what were your driving impressions?
I already have the rear f-sport sway so buying another set just to get the front is too much hassle.
03-18-16, 08:12 AM
#2
I have the IS F front sway bar on my 2011. I swapped out from the F-Sport to the IS F bar as I was getting some clunking from the F-Sport bar in cold weather (below -5C) that I didn't care for. The IS F bar is actually a larger diameter (just slightly) than the F-Sport bar. That said, both are hollow and the IS F bar has a thinner wall thickness.
Obviously I didn't cut them open to measure the exact differences, but the IS F bar is noticeably lighter then the F-Sport. In practice the IS F bar is slightly less stiff than the F-Sport and so lends itself to oversteer a bit more when coupled with the F-Sport rear bar. I like it, a good balance.
The bushings used on the IS F bar are far superior to the ones that come with the F-Sport kit and I no longer experience any odd sounds from the front suspension.
If you have a 2006-2008 ISx50 the bar is a direct fit, if you have a 2009-2013 you will need end links from an IS F or a 2006-2008 ISx50 as they are different.
Jeff
Obviously I didn't cut them open to measure the exact differences, but the IS F bar is noticeably lighter then the F-Sport. In practice the IS F bar is slightly less stiff than the F-Sport and so lends itself to oversteer a bit more when coupled with the F-Sport rear bar. I like it, a good balance.
The bushings used on the IS F bar are far superior to the ones that come with the F-Sport kit and I no longer experience any odd sounds from the front suspension.
If you have a 2006-2008 ISx50 the bar is a direct fit, if you have a 2009-2013 you will need end links from an IS F or a 2006-2008 ISx50 as they are different.
Jeff
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firelizard (04-15-23)
03-18-16, 10:49 AM
#5
I have the IS F front sway bar on my 2011. I swapped out from the F-Sport to the IS F bar as I was getting some clunking from the F-Sport bar in cold weather (below -5C) that I didn't care for. The IS F bar is actually a larger diameter (just slightly) than the F-Sport bar. That said, both are hollow and the IS F bar has a thinner wall thickness.
Obviously I didn't cut them open to measure the exact differences, but the IS F bar is noticeably lighter then the F-Sport. In practice the IS F bar is slightly less stiff than the F-Sport and so lends itself to oversteer a bit more when coupled with the F-Sport rear bar. I like it, a good balance.
The bushings used on the IS F bar are far superior to the ones that come with the F-Sport kit and I no longer experience any odd sounds from the front suspension.
If you have a 2006-2008 ISx50 the bar is a direct fit, if you have a 2009-2013 you will need end links from an IS F or a 2006-2008 ISx50 as they are different.
Jeff
Obviously I didn't cut them open to measure the exact differences, but the IS F bar is noticeably lighter then the F-Sport. In practice the IS F bar is slightly less stiff than the F-Sport and so lends itself to oversteer a bit more when coupled with the F-Sport rear bar. I like it, a good balance.
The bushings used on the IS F bar are far superior to the ones that come with the F-Sport kit and I no longer experience any odd sounds from the front suspension.
If you have a 2006-2008 ISx50 the bar is a direct fit, if you have a 2009-2013 you will need end links from an IS F or a 2006-2008 ISx50 as they are different.
Jeff
How would you compare the stiffness of the ride of the ISF sway to the stock is350 one? Much stiffer or only slightly?
03-18-16, 11:27 AM
#6
When I did the F-Sport sway bars I did both front and rear, which was significantly different from the stock sway bars. I never ran the F-Sport rear with the stock ISx50 front, so I can't comment on the difference that would make, although during diagnosis for the clunking I did drive the car without a front sway bar and I can tell you that made a very noticeable difference (though still not as bad as I expected, to be honest!).
That said, I would definitely say it's worth getting the front bar, the balance of the car is very nice with the IS F front and F-Sport rear. I wouldn't change it I don't think.
Jeff
That said, I would definitely say it's worth getting the front bar, the balance of the car is very nice with the IS F front and F-Sport rear. I wouldn't change it I don't think.
Jeff
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10-09-18, 08:06 PM
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10-11-18, 10:16 AM
#15
Hmmm. I've had the F-Sport front and rear sways for quite some time now and am actually considering the IS F front after reading Jeff's review.
Funny thing is I did have clunking with the F-Sports shortly after install, but my guy tweaked some things and haven't had an issue since. Just looking to change things up and see how it feels.
Funny thing is I did have clunking with the F-Sports shortly after install, but my guy tweaked some things and haven't had an issue since. Just looking to change things up and see how it feels.