DAW claims on their website the Ultra Flow X will make 730+whp and the 6466 800+whp. Of course those numbers are on ethanol but it will tell you that the 6466 is a larger turbo with more power potential and slower spool time.
From what I have seen the Ultra Flow X made 524whp on 93 octane at...
It’s better to have power across a larger rpm range than going for peak power especially for the street. Don’t get so hung up over peak hp numbers.
A larger turbo will make more power on the same boost level or make the same power at a lower boost level like you stated but at the cost of slower...
We have these available in our CA inventory:
https://oemplusmods.com/products/rear-diffuser-extensions-for-gr-supra-a90-91
https://oemplusmods.com/products/side-skirt-extensions-front-for-gr-supra-a90-91
https://oemplusmods.com/products/side-skirt-extensions-rear-for-gr-supra-a90-91
I think it’s best to contact your tuner to see what they say but ideally I would say you should have a retune with each substantial modification. Perhaps it also depends on the cat inside the downpipe if it’s a 200, 300, or 400 cell.
@b58mk5 on instagram charges $100 for labor but you would have to ship your lights to him. Or he could source some used lights for you too and install the lens on those. He can also add a controller for animations and rgb. We posted a video of it on our instagram.
Finding a shop or someone...