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RR Racing Street Version Ultimate Steering Response System (USRS) for Lexus (Pair)
Lexus Lower Control Arm (LCA) Bushing

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Our Price: $348.00

Availability: Usually Ships in 1 to 2 Weeks
Product Code: ISFXLCA002


This is a new version with a softer 85dur bushing designed for the Street. Please note that the original version (with the red bushings) provides the best performance overall. This version is recommended for AWD vehicles per fitment table below.

We are excited to have designed and manufactured the new RR Racing Ultimate Steering Response System (USRS). USRS is an upgraded lower control arm (LCA) bushing and housing. It is not often that a product offers so much for such a reasonable price and easy installation!

Ever read magazine articles comparing Lexus and BMW's, filled with complaints about Lexus's lack of steering "feel?" Our goal with the Lexus LCA upgrade was to significantly improve steering feel and turn-in response. One of the problems with the Lexus front suspension is the soft rear control arm bushing. Not only does this bushing deflect laterally under load, but it also deflects fore/aft under braking, leading to imprecise and sometimes "wandering" steering feel caused by movement of the effective contact patch of the tire. All current aftermarket offerings address the lateral deflection, but do little to eliminate the fore/aft deflection that leads to dynamic toe changes under braking and cornering.

By eliminating excessive movement of the soft stock lower control arm bushing, we dramatically improved steering response and feel during hard cornering, without the excessive vibration and harshness associated with race-only hard spherical bearings. As illustrated in our image gallery, the OEM suspension control arms, under braking and cornering, actually move with respect to the chassis. This results in increased understeer, non-linear steering response, and reduced stability under hard braking conditions, and in many cases excessive inner tire wear, a well known problem on many Lexus models. We have designed our USRS to significantly reduce all dynamic toe changes and lateral deflections!

Please watch the video below for a detailed overview of USRS and on-car comparison between USRS and the Lexus OEM bushing.

Summary of Features:

  • Our bushing virtually eliminates unwanted suspension movement, that lead to changes in toe, caster, and camber while turning and braking.
  • Our redesigned housing increases static caster by 0.3-0.5 degrees. Increased caster improves steering feel and camber gain when cornering.
  • Comes as a complete and assembled bushing & housing assembly - no costly labor and hassle in pressing out old OEM bushings.
  • Redesigned 6061-T6 lower control arm housing designed to be stronger than OEM to withstand increased thrust loads.
  • Extremely tough 88 durometer polyurethane bushing -- backed by our lifetime guarantee!
  • Polyurethane bushing features fully fluted design on shaft and thrust side for enhanced lubrication. Also features end seal to keep dirt out.

All components in this product are proudly engineered and manufactured here in the United States of America.
Please click on one of the links below for more relevant detailed information about our approach to engineering great products for your Lexus:
RR Racing Lexus IS-F Project.

Compatibility Table
Make Model Year Range
Lexus IS-F 2008-2014
Lexus IS250 (RWD/AWD) 2006+
Lexus IS300/350 (RWD/AWD) 2006+
Lexus IS200t (AWD/RWD) 2015+
Lexus GS (all models) 2006+
Lexus RC F 2015+
Lexus GS F 2015+
Lexus IS500 2022+
Lexus RC350 2015+

The following video has a short overview of USRS and comparison with the OEM lower control arm bushing:

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 12 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Must have February 5, 2024
Reviewer: Roland  
Easy install, car feels more responsive & a plus I didn’t loose any of my comfort.

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  0 of 0 people found the following review helpful:
3 of 5 2019? November 10, 2023
Reviewer: Zach Lake from Belding, MI United States  
With this fit a 2019 is350 f sport?

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  0 of 0 people found the following review helpful:
5 of 5 October 3, 2023
Reviewer: Josh Duet from Haughton, LA United States  

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  0 of 0 people found the following review helpful:
5 of 5 Great option to sort out the excesive inner tire w August 25, 2023
I bought this product to sort out the excesive tire wear in my Lexus IS300h. It really worked! I have been driving the car for more than 3000 miles and it shows no signs of wear! I took the car to the dealer before and there was not a solution. It is worth to spend some money and sort it out forever. Good communication with the seller when asking questions about the product.

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  0 of 1 people found the following review helpful:
5 of 5 Must have item August 5, 2023
Reviewer: Benjamin from Kingston, NH United States  
Love it. Holes didn’t line up perfectly so we had to modify it slightly.  Still, well worth it if you want it to handle like your grandma’s Lexus.  Just put RS-R Super Lows on it after a month of driving with just the USRS. It’s made my much happier with the handling and the car overall.

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