AM I READING THE CHART WRONG?? On the F-Sport website it says the IS350 is 42% stiffer. Everyone here says 6%. I'M CONFUSED!

 

I think that's an error, the 250 rear and 350 front should be exchanged, it should be 250 rear (42.8%) and 350 front (6.3%).

 

hmmmm. How do we find out for sure?

 

I'm sure buying both F and R would be best since they were designed to be used together. I got both for my 250 and didn't care about the numbers since there are other factors in determining their effectiveness. I'm happy and I like the way it handles better.

 

@IStwofifty read page 5 of this thread... the original numbers from the site are there, the new updated chart is "f"d up

 

Just installed F-Sport F&R sway bars as well as F-Sport Exhaust my friend owns shop and he let me use his lift. Entire install took about 1 1/2, the only problem I had was one of the bolts on rear sway bar that rusted on and was a royal pain to remove.

 

More pics

 

I just installed the rear on my is350. I can feel the improvement. This is my first rwd and before it felt like the back would spin out, now it feels more firm.

 

guys if I install the sway bar + under chassis.. can I feel the improvement vs only the sway bars??? worth the money to buy the under chassis???

 

Some people say under chassis is worth it, most say it isn't. If you're tracking it you'll notice it, but if you have both, majority of improvement will be due to sways. If you have extra money and nothing else you need/want, go for it.

 

i have a 350, which one is the worth it to get, i presume the rear is the best to get instead of both ?

 

^ Just the rear is fine for the IS350, unless you're sitting on a pile of cash and can afford a couple hundred for 6.3% increased stiffness.

 

now time to look for a rear! suggestion on cheapest place to get one?

 

There's an off-chance Sewell might be having another F-Sport summer sale this year (25% off MSRP). If you can hold out for a little bit, I would wait and see.

 

I think ill wait for that then. =)