macmaster

I'm close to pulling the trigger on GS F bushings for the IS500 (which I understand are the same as IS350), but I'm having trouble understanding what are the physical differences between the GS F bushings (# 48075/6-24010) and the IS bushings (# 48075-24010) that make them so superior? From catalog images, they literally look exactly the same (thickness, material, dimensions, etc). Does anyone have a side by side image of them and/or can describe the differences? Thanks!!!

laobo979

iTrader: (5)

Since you got the IS500 heavier front end and power. I go with Figs or RR racing bushing over the GSF/RCF oem.

RRRacing

iTrader: (1)

You would need a Durometer Shore A meter and each bushing to truly answer this question. As far as dimensions and material they are the same.

-Justin
RR Racing

macmaster

So it's the hardness of the rubber? Wouldn't that count as different material?

RRRacing

iTrader: (1)

When I say the same material, I mean it's still rubber, just arguably harder rubber. When you switch to aftermarket, you switch the rubber out for a Polyurethane which has a harder durometer. With this, the control arm no longer has the lateral movement that contributes to premature tire wear and lack of steering response. To go one step further, our RR Racing USRS bushing has a built in thrust washer that prevents Axial movement ( allowing the control arm to travel under braking). The video below shows how the USRS bushings work.

-Justin
RR Racing

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