It took alot of work to get these wheels on to my 2002 SC430...Don't Ask!
I found the wheels and tires (the fronts were shot from too much camber wear) for $700 on the G35 forum classifieds:
They came without centercaps so I ordered a set of 4 along with stick on Lexus logos in Black pearl from:
I sent out the centercaps without the logos to be powder coated in satin black to match the powder coated Rays wheels.
I have Brand New 245/35/19 Nexen N7000's on the front 19x8" wheels and 245/40/19 Potenza RE050's (that came with the wheels) on the rear 19x8.5" wheels.
Once the rears wear out I will be putting 265/35/19's on the rear.
I also got Gorilla Lug Nuts in Black from Amazon:
and a set of Hub Centric Rings - O.D. 66.06 - I.D. 60.06 from:
I think these wheels with the stock offsets look sweet on the sc430!