Does anyone know if stock 17" GS400 RIMS from a 98-01 GS400 would fit a 2006 GS430? I'm guessing bolt pattern is the same but just wanted to make sure offset and hub sizes are okay ?

 

No it wont. The 06+ GS430 has huge front calipers, much bigger than the previous version GSs. I had ordered aftermarket high pad wheels and still had trouble fitting them on my 06 430. I had to run 5mm spacers in order to get them to fit, and even then there is maybe 1 mm of space between the caliper and the wheel. Ive had 2GS cars before and the stock rotors up front are much smaller.