So I purchased a 2021 is 350 without the dhp, not knowing that meant it came with an open diff and now I’m kinda unhappy with it. So I was wondering if there was any way I could swap in the Torsen lsd into it? If anyone could send a link to where I can buy one it would be appreciated.

 

I believe 41301-53051 is the part number for the actual torsen unit, which can be swapped into your differential case.

 

What's the gear ratio on these?

 

I believe it doesn't have one... this swaps into your diff and reuses the gearing.

 

Did you ever go through with the swap? Considering the same for my 2024 IS350