zen

iTrader: (6)

The Lexus part number for the GSF/RCF LCA bushings share the same part number, but for the ISF is different. Does anyone know if the GSF/RCF lower control arm bushings are interchangeable with ISF ? Are the GSF/RCF LCA bushings better design/stiffer than the ISF bushings?

The part number that I found:
GSF/RCF 48075-24010, 48076-24010
ISF: 48075-30020, 48076-30020

Joker4096

iTrader: (2)

I'm not sure, but why not go aftermarket with Figs or RR-Racing lca bushings. They make a huge difference.

Pqbrown

iTrader: (9)

flowrider

iTrader: (9)

^^^^But the make a HUGE improvement in handling

Lou

threefiveo

They swap right in, I ordered the RCF bushings and installed. They are a slightly harder compound and do make a difference without needing to worry about the squeaks that can develop with the poly. Though I'm sure the poly make a larger difference in handling.

zen

iTrader: (6)

Do you have the part # ? Is it the same part# that I have listed ? Poly does make a huge difference in handling/braking/steering wheel feel, but suffers ride quality. I have the RR LCA bushings, but I drive on streets and no tracks so I'm more into the rubber bushings now. The RCF/GSF LCA bushings can be a 3rd choice for ISF.

EdsISF1021

How does it compare to the stock isf bushing and also did it fix the front camber wear??

threefiveo

Sure, the part numbers are (48076-24010 and 48075-24010) same as you listed. As far as the +/- 20 offset, I went with the zero. There is a noticeable difference in feel when cornering and braking but no noticeable increase in NVH. I haven't driven a car with the poly so I can't compare with RR or Figs.

The parts look identical to stock ISF but the rubber is a bit harder compound. My car came with new tires and I put the bushings on shortly after purchase and so far the tire wear is even last I checked.

Another reason I went with the Lexus parts is my car is on certified warranty for a few more years and I don't want anything aftermarket that could come up as a potential question with a warranty repair. It looks identical so its not something a tech would get under the car and see as an issue. If my car was out of warranty, I probably would have leaned more toward the poly.

EdsISF1021

Awesome! Thanks for the reply. Let us know about the wear and feel down the road.

lawrence1

Bummer. Wish I had seen this last week. I just replaced mine with new OE is-f bushings as mine were showing cracks all the way around. Car feels much smoother and better. These are a wear item on many BMWs as well but the job is much easier on the IS-F as they are easy to slide on and off the control arm shaft.

lobuxracer

iTrader: (2)

There is no camber wear on the IS F at any reasonable ride height. Inside edge wear is caused by toe control, not by camber.

EdsISF1021

But but the figs and RR racing bushings help with that right? So I'm wondering if the RCF bushings would help with that as well?

psychowu

Could you give us an update on tire wear? Thanks!

threefiveo

Sure, though I probably haven't put 5k on the F since my last post but tire wear is still perfectly even. This was one of the first mods (really the only mod) I have done to my car. Its a 14' and on warranty so keeping it mostly stock for now.

E46CT

I'd mostly agree with this. I'm always telling people "it's not camber!" Short story is camber can contribute to the abnormal inner wear we all experience in conjunction with dynamic toe change, but it's moot point because none of us want to drive around with 0 camber unless you're a drag racer or brake tester. You're right though it's mostly due to toe control. I like the idea of the GSF/RCF bushing upgrade though as I'd rather go rubber. Polyurethane is a poor choice for a multi-axis bushing in a suspension that's designed to deflect for performance/confidence on the street. You have to pay to play.