The SportRack Semi-Custom Roof Rack part numbers # SR1005 and # SR1116 is a confirmed fit for your 1997 Lexus SC 300. For the price this option is tough to beat, but this is a semi-custom rack that isn't going to fit as well as a fully custom rack.
For a fully custom rack I would strongly recommend the Inno part numbers # INB117, # INSUT, # INJK, and # INK153 which is going to fit much better. view full answer...