350PsDMeuP

iTrader: (1)

does anyone know if this is possible? 08 IS-F suspension on an IS 350, is it a direct swap any mods needed or is totally different....

nmpeter

iTrader: (15)

It would probably fit but why in the world would you want to do that to begin with?

Not only would it be pretty pointless but it would probably not drive as nice as it should.

Eldr1dgE

Should be a direct swap..but since the is-f weighs more than the 350, the spring rates and damper rates might be too stiff for the 350..would be interesting to see the results in ride height and ride quality..i say try it out..

Jeff Lange

iTrader: (1)

2011 Curb Weights:

IS250 M/T:
F: 1804lbs
R: 1651lbs
T: 3455lbs

IS250 RWD A/T
F: 1775lbs
R: 1660lbs
T: 3435lbs

IS250 AWD:
F: 1982lbs
R: 1669lbs
T: 3651lbs

IS350 RWD:
F: 1849lbs
R: 1678lbs
T: 3527lbs

IS350 AWD:
F: 2011lbs
R: 1693lbs
T: 3704lbs

IS F:
F: 2045lbs
R: 1735lbs
T: 3780lbs

Based on the above, I'd say you'd be better off finding the factory Sport Suspension for the IS250/350 than going with the IS F suspension, but it's hard to know exactly how it would handle. I had also planned on going for the factory IS F suspension, but now I'm thinking that the IS250 Sport Suspension might be the way to go instead.

Jeff

jasonis250

I have a 2010 a/t rwd 250. with the staggered 18's im going to put the stock f- springs in it. i will let you kno eveything and pic's with in a week ok.

lobuxracer

iTrader: (2)

The geometry on the F is different as well as the springs and shocks, so you're not going to get what you expect.
As softly sprung as the 2IS are from the factory, I'd really doubt it would be bad. The F needs more front spring for track work - it definitely likes to lift the inside rear wheel in fast on-camber turns, so it may not be all bad if you want better track manners.

You might be very unhappy with the street performance though.

350PsDMeuP

iTrader: (1)

Let me know, how it turns out....I really like the factory stance of the "F" but I don't know how well it would sit with my 20's and with my car being lighter..

350PsDMeuP

iTrader: (1)

Uh oh, I was liking what I read until the very last sentence, that's what I am mostly concerned about.......street performance, I would hate to have the ride too stiff, although I am 210 lbs. so it should balance out maybe...

Jeff Lange

iTrader: (1)

While that is true on the 08-10 IS-F (2 of the rear links were different). The 2011 IS-F uses all of the same links and control arms as the 2011 ISx50 with Sport Package.

Jeff

350PsDMeuP

iTrader: (1)

Does that mean it wont be an exact swap....

Jeff Lange

iTrader: (1)

The IS F springs/shocks will probably fit fine, but they're designed for a different weight vehicle with different suspension geometry. It won't handle just like an IS F, it will be slightly different.

Probably not bad, but not identical to the IS F. You could always order the arms that are different if you really wanted to.

Jeff

lobuxracer

iTrader: (2)

The front hubs are also different and the front track is wider on the F - still - because the brake calipers and discs are unchanged. So wheel rate on the front will be likely stiffer.

So, you've looked up all the part numbers and they're the same on the F and F Sport models for 2011?

Jeff Lange

iTrader: (1)

That is correct. I checked all the control arms (front and rear), and the rear subframe (front subframe is obviously different to accommodate the 2UR-GSE).

You are correct about the track differences between the ISx50 and the IS F. Obviously the wheel/tire specifications will also make an appreciable difference as well.

Jeff

lobuxracer

iTrader: (2)

Sweet! Which pieces are they? The two that measure out differently in the service manual? I think I can afford two links a lot easier than waiting for a wrecked 2011 F and getting the whole rear subframe...but I would get the LSD with that too...still...

CarbonDtls

iTrader: (4)

Not worth it. The 07-08's are known to have a very stiff(too stiff) suspension.