Hi, I am trying to replace all of the bushings in my suspension. I have found a kit for the gs300 but not for the gs400, I was wondering if they were the same and it would be ok to purchase the gs300 kit for my gs400.

 

Yes, they are the same.

 

The GS300 and GS400 use the same bushings. Surprised the manufacturer doesn’t have it labeled for both cars? Make sure the kit is for the second generation GS, and isn’t specifically for the first generation GS300 built from 1993-1997.
There are a few companies manufacturing bushings for the 2nd gen GS. There is a company called StrongFlex that sales them individually or in sections, another option is Siberian Bushings, what seems to be the top of the line would SuperPro Bushings. These are all available on eBay and elsewhere.