I am sure this has been discussed before however I wanted to enquire if anyone has changed the final drive ratio on their Lexus IS300.

I have an Australia spec 2003 with the 3.9 ratio Torsen LSD and wanted to upgrade it to the following:

https://www.greenline.jp/catalogue/i...ZN6&fromlink=2

I believe a 4.5 ratio will provide a great pick up in acceleration and I am not too fussed about the partial loss of fuel economy.

Would this particular set to suit a Toyota 86 / Subaru BRZ diff be a direct bolt in?

Thank you. Any feedback is appreciated.

 

You can. If you are a stick the speedometer will be off. Automatic does speed with the ABS system. I will turn about 600 more RPM then the stock.