I just recently got a 2011 is250 awd and want to lower it. I have a set of tanabe gf210 springs laying around but I’m not sure if they would work for my is. I don’t know what they are originally from. Any reason they wouldn’t work for my car?

 

If you don't know what they came off then there could be a number of reasons why they wouldn't work.

Too long or short
Too wide or narrow
Spring rate completely incompatible with damper

I would see if there is a part number printed on them and try to find out what it is off first... Then probably sell them an buy some made for the Lexus

 

I got these off ebay for my awd

D2 Racing Lowering Sport Springs Set New for 06-12 IS250 IS350 RWD D-SP-LE-05