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Looks pretty good. Some feedback:

The wheels don't look very good, could do with being re-done (The lip of the wheel in particular is really thin it basically looks like the spokes go right into the tire, even though they don't) It could benefit from a thicker side wall too. (check stock LS400 tire wall)

Lights (front & back): look a bit 2D and could do with some additional depth. The rear lights could do with a new layout too, the taillights / brakelights are a bit tall. Meanwhile the slot I thought would be used for an indicator is actually a reverse light.

Exhaust: The exhaust looks like its lost. Needs to be moved further back a *lot* also this thing has a V8, could do with being a twin exhaust stock (one either side) (Google LS400 Back)

Rear Bumper: Looks a bit flat, could do with some extra details. (Google LS400 back) maybe add a cut out for the exhausts too.

Rear Doors: These two edges could do with being sharp. https://prnt.sc/qA119sZ_9cj7

Bodyshell/Front Doors: These edges could do with being marked sharp https://prnt.sc/QlUE_ThMySvR (blue is optional, try it, see if it improves the normals, keep it if it does, leave smooth if not)

Tuning: The exhausts / rear bumper combinations could do with being combined (check the Sentinel SG3 Pack for an example of this, or improve the stock exhausts) Also a lot of the mod names are missing
and could do with being added. The front bumpers have running lights, id recommend switching the material to a non emissive material, it'd look better. (and those with graphics mods would not be blinded)

Also, Reset your tuning parts to world before exporting. (Check sultanrs bumper for example of how this should be done) Not doing this results in the deformation being bugged on tuning parts.

https://prnt.sc/JBIGNuO80dBs <-- Bugged https://prnt.sc/sBF7Hck69ePA <--- Not Bugged

Base Model: Lacking LOD's.

If you'd like to DM me regarding the feedback on Discord, feel free too. (Discord link on my profile) Keep up the good work. ^^