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RR Racing Road & Track 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: ISFXLCA001


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: 22 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Great steering behaviour Lexus GS450h February 27, 2024
Reviewer: Manuel Atienzo from Purmerend, Noord Holland Holland  
After 15 years was it time to change the bushibgs from the lower control arms of my Lexus GS450h. Instantly upgrade of the steering behaviour after putting the USRS’s on the car. Quicker response, more stable corneting, more stable braking behaviour and finally getying the right sensation of driving the Lexus with 350bhp. Great upgrade!!! I recommend it.
Shipping to The Netherlands wasn’t any issue. Also fast and good feed back when asking questions to the team. Keep it like this guys!!!

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  0 of 0 people found the following review helpful:
5 of 5 USRS Install February 18, 2024
Reviewer: JRM from Falls Church, VA United States  
Traveled to RR Racing because no garage around me could do the work.  So happy that I did.  RR Racing took me in early and did a fantastic job!  I love how my car feels now and the winding roads are so much more fun to drive.  I couldn't be happier.  Excellent service and hospitality!

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  0 of 0 people found the following review helpful:
5 of 5 65k February 3, 2024
Reviewer: David DeShazo from Soquel, CA United States  
I put these on my 2014 IS350F and ran them for over 65k and I am absolutely sure there is no one mod you can do to your suspension for this price that will improve the stability and tire wear more. Don't tell Simon but I would pay double what he's asking!
I absolutely am going to put these on my IS500

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  0 of 0 people found the following review helpful:
5 of 5 USRS September 9, 2023
Reviewer: Eduardo Contreras from Palmdale, CA United States  
The lower control arm bushing change made a big difference on cornering feel, and stability of the front end you need this mod if you want to go driving around corners literally find myself going and looking for them.

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  0 of 0 people found the following review helpful:
5 of 5 LCA August 19, 2023
Reviewer: Raymie Fukumoto from Kaneohe , HI United States  
Well worth the effort and cost

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