Is it possible to convert a Lexus GS300 to a manual transmission?

Yes, it is possible to convert a Lexus GS300 to a manual transmission, but it involves significant modifications. This process typically requires sourcing a compatible manual transmission, clutch components, and adapting the drivetrain. Additionally, modifications to the pedal assembly and possibly the ECU may be necessary. It's a complex project best suited for experienced mechanics or enthusiasts.