Good day. I would like to ask the experts how to upgrade my diff on my 2007 Lexus IS 220D. I have the sport version with the so called short gear. Which and from which car to choose a differential to be 100% compatible and to be LSD / Torsen. Someone claims that from the Lexus GS 400, LS 600, IS-F, but I'm not very wise about it. Please advise which one to choose and from which car to get the right one. Thank you

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