I have a set of BC Coilovers that have been on my ISF for about 3000 miles.
I'm 100% sure they will fit the IS250 and IS350.
They are 12K Front and 10K Rear.
I'm looking for $800 Shipped for them. I paid $1100 for them.
They work great and improve the cars handling. If you have any questions or are interested please email me at: VeeralS05@gmail.com