lexussingh

I'm considering buying RR Racings street version bushings for my IS 500 or the RCF bushings for the purpose of better steering feel and to hopefully mitigate the issue of premature tire wear that these models are known for.
A couple of questions,

1. How does the steering response feel with either of these bushings? Is it significantly stiffer?
2. Which one should I get with for daily driving? I like to get on the gas from time to time, but I don't do any racing.
3. If someone has tried both, how do they differ in terms of feel, response, etc?
4. Is it worth it?

Thanks in advance.

wthrman2

^^ I haven't tried the RR Racing bushings but I have the RCF/GSF bushings and I feel it is a good middle of the road approach. It preserves the Lexus driving signature, doesn't introduce NHV, is cheaper and will help mitigate some of the tire wear issue.

1. It is a bit stiffer but not OMG this is super stiffer or significantly noticeable....
2. The RCF/GSF will be adequate for regular daily driving and the odd spirited driving
3. Can't really comment
4. For me, I would say yes....but I didn't pay lots and I felt it was worth it

giS

^^^ same. Also going with the RCF/GSF bushings doesn’t get squirrelly with your warranty.

18borat

Is there a part no. for this? Would really appreciate it.

lexussingh

I believe these are it:
https://www.lexuspartsnow.com/parts/...tra2=&filter=()
https://www.lexuspartsnow.com/parts/...knuckle,,48076

48075-24010
48076-24010

lexussingh

Thanks for the reply.

RRRacing

iTrader: (1)

I thought I would offer some input.

The RCF bushings are marginally harder than the IS bushings. They measure out around 54 while the IS is around 46. While I haven't had a GoPro on them, I can't imagine they reduce a ton of the lateral control arm movement. I know for a fact they do nothing for the Axial (front and back) movement from hard braking. This is what causes toe in under hard braking and is a major contributor to inner tire wear. With the large pre-loaded thrust washer on the RR Racing bushing, it is the only bushing on the market that prevents that type of movement.

These bushings are not aggressive as they are made out to be. We put them on brand new, 2k mile IS500's and never hear a peep from the customers about vibrations or any of that. We also put them on RCF's regularly. That's right, RCF's have inner tire wear just like everyone else. They are not exempt. Think about that before you spend money on their bushings.

Justin | RR Racing Sales

cp2

iTrader: (1)

RR Racing is having a holiday sale and so I finally broke down and bought a set of the USRS street version. the stiffer race track version is also on sale. also got some love for Veteran's Day as well to cover the shipping.

RR Racing USRS Street ver

thanks Justin!

lexussingh

Nice!
Please let me know how you like them.

dk12

Hi ,I was one of the first is500s with usrs bushings from rr racing. I've had them for around 3k miles now with no increased vibration or noises. I got the road version and steering wise there should be a difference, I got the strut bar and bushings at the same time and after there was def a difference in steering response and body roll can't say exactly which helped more but, I think the biggest advantage is the inner tire wear, when had them installed my oem tires had only 1500 miles and there was already a strip of inner wear, after the bushings got put in I got ps4s and so far there is almost no inner wear. I was one person who was convinced the rcf bushing were fine, its act what I had on the car before I got the rr racing ones and as Justin said the y still have a lot of play and the difference between those and the stock ones is negligible. Here's what they look like installed:

LaZeR

Hey, for everyone who got new lower control arm bushings installed... what is % likelihood Alignment will go outta whack - would like to know "even slightly outta whack"? THANKS!!

giS

For me the dealership did the alignment at the same time of the LCA install

LaZeR

Hey @RRRacing Justin, did most of your customers getting new bushings installed ALSO require, or request, a (4-wheel) Alignment? THANKS!!

wthrman2

^^ As per my PM, if all they are doing the LCA bushings, they won't touch your rear so you wouldn't need a 4 wheel alignment although the cost for a front wheel alignment vs a 4 wheel makes it almost worth getting the 4 wheels done. If you haven't done one in a while, might as well get it done because the whole idea of swapping the bushing is to help prevent the inner tire wear so the alignment will also help and is not that expensive.

vpar23

Excuse my ignorance or local of knowledge on this matter but this is the first mod I’m looking to do. One - would this mod modify any power train warranty and who could I go to install this piece? Would Lexus do this?

looking to do this because of the notorious inner tire wear.