[Clash0901]

BIG EDIT:

After some research I found the Lexus LS430 rear end is a 3.266 ratio and it's a 200mm. I can't find the exact part numbers of the internals. Would the guts of this rear end fit and work without major modification in my BRZ rear end? Does anybody know for sure?

Thanks,

--Original post below, ignore this--
So I have a BRZ with a 4.10 torsen LSD. I did some research and saw a few lower OEM toyota options but i'm curious how that works.

If I put like a 3.58 gear (part number 41201-80125) or lower in the rear end, would I retain the strength of the rear end? The car will be making around 700whp and probably 650ft/lbs to the wheels. I am not exactly sure how rear ends work.

My BMW trans has a 1:1 5th gear ratio so I need something to get me into about 150mph at least with a 27" tire

Any help here?

Thanks,