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Rear Chassis Brace

11686 Views 21 Replies 8 Participants Last post by  TinCan, 
G
I am really anxious to start modifying my IS-F. Does anybody know if the Lexus F-Sport rear chassis brace for the ISX50 will fit on the IS-F?
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SuperFreak
It does:cool:

http://www.lexusf.com/forums/showthread.php?t=420&highlight=understeer+help
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BigMikeISF
Welcome to the site!! Congrats on your purchase! The link above will help you out with your question :)
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M
if may fit fine, but is it really an upgrade or merely a change?
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BigMikeISF
micaISF said:
if may fit fine, but is it really an upgrade or merely a change?
Click to expand...
The F sport lower sway bar is 3mm thicker then the stock one that comes on the F (16mm stock vs 19mm with the F sport). Adding thickness to a sway will reduce body roll when turning in the F. Those that have this mod say it's worth the extra 3mm and it really reduces body, others question whether it really makes that big of a difference. It's up to you to see if it's worth paying for the 3 extra millimeters.

I found an interesting article that I posted below about how sway bars work (for those who aren't too sure), it's pretty cool stuff imo

http://www.houseofthud.com/cartech/swaybars.htm
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lowrider
Not to hijack this thread, but I'd like to find a really good STB for the F. I put one one on my last car, a G35 Coupe, and it really stiffened it up, tied the front end together. It turned the G into a slot car. I'd love to find something like this for the F.

Lou
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M
BigMikeISF said:
The F sport lower sway bar is 3mm thicker then the stock one that comes on the F (16mm stock vs 19mm with the F sport). Adding thickness to a sway will reduce body roll when turning in the F. Those that have this mod say it's worth the extra 3mm and it really reduces body, others question whether it really makes that big of a difference. It's up to you to see if it's worth paying for the 3 extra millimeters.

I found an interesting article that I posted below about how sway bars work (for those who aren't too sure), it's pretty cool stuff imo

http://www.houseofthud.com/cartech/swaybars.htm
Click to expand...
i don't think he was referring to rear sway bar. chasis brace is a completely different mod.
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lowrider said:
Not to hijack this thread, but I'd like to find a really good STB for the F. I put one one on my last car, a G35 Coupe, and it really stiffened it up, tied the front end together. It turned the G into a slot car. I'd love to find something like this for the F.

Lou
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i found a couple for IS350 which should fit the F( i think) i dont remember the manufacturer, a search on IS350 forum should yield something.
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BigMikeISF
micaISF said:
i don't think he was referring to rear sway bar. chasis brace is a completely different mod.
Click to expand...
Your right, I read the title of the original thread that SuperFreak posted and went off on a tangent about sway bars trying to help, oops :( At least it'll serve as a good reference for others on sway bars :cool:


This thread will then answer the original question of whether or not the rear chassis brace will fit

SuperFreak said:
It does:cool:

http://www.lexusf.com/forums/showthread.php?t=420&highlight=understeer+help
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TinCan
So this does fit the IS-F? I know it fits the 250/350.

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U
^^ great looking piece but I think that goes under the front (motor).
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TinCan
UCrazyKid said:
^^ great looking piece but I think that goes under the front (motor).
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lol That part is a REAR chassis brace... Just wondering if it fits the IS-F
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TinCan said:
lol That part is a REAR chassis brace... Just wondering if it fits the IS-F
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LOL, well it still looks good! Hahahaha. It just looks a whole lot like the front chassis brace I had on my S2000's.

It's designed well, if it fits I'm sure it would help.

From what I have learned about IS350 differential swaps into the IS-F I'm guessing clearance should not be a problem, it's just a matter if the mounting points on the rear sub-frame are the same.

Find dealer that will order it and give a refund policy if it doesn't line up?
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lowrider
TinCan said:
lol That part is a REAR chassis brace... Just wondering if it fits the IS-F
Click to expand...
I believe it does, however the things I've read about it in the IS forums say it doesn't do very much. And, Lexus says the rear of the F already has two braces. See attachment.

Lou

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B
^yeah, i was about to post the same thing.
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TinCan
I still am going to put one on I like the TOMS but not too sure how much it is.

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TinCan said:
I still am going to put one on I like the TOMS but not too sure how much it is.
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why? the F already has one stock??

the full story: http://www.lexus.com/models/ISF/features/performance/Suspension_Story.pdf
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TinCan
It's better made... It's something to do to the car... It comes with the extra little brace for the middle...and I'm sure it does something even if is a little...;)
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TinCan said:
It's better made... It's something to do to the car... It comes with the extra little brace for the middle...and I'm sure it does something even if is a little...;)
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Don't know about that. You'll hardly see an improvement over the stock piece, if any at all. Sure, if it didn't have one stock then yeah it'd be mostly worth it. The Tom's brace is probably $600-$1000. You're better off saving for something more useful, like coilovers or better tires. The stock brace has the middle piece I believe you're referring to. It's just covered in the pic by the rear subframe. It's underneath that not shown.
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TinCan
Bulls23337 said:
Don't know about that. You'll hardly see an improvement over the stock piece, if any at all. Sure, if it didn't have one stock then yeah it'd be mostly worth it. The Tom's brace is probably $600-$1000. You're better off saving for something more useful, like coilovers or better tires. The stock brace has the middle piece I believe you're referring to. It's just covered in the pic by the rear subframe. It's underneath that not shown.
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the toms is that high?
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