I have no idea decibel wise as I never measured it. I always put my car in normal mode whenever I see police and it's basically as quiet as stock unless you romp on it, which you wouldn't be doing in that situation. ;)
If it helps, here are two of my videos. Exact same recording setup. One with...
Will rub front outer fender liner if you are too low and/or soft spring rates.
I run 295/35/18 on 18x11 +28 in front. .5" lower. 650lb front springs and I slightly rub outer fender liner on hard compressions on track. It's about 98% self cleared at this point though.
Dealer or update via ISTA yourself.
Will need bench unlock after, and depending on how long ago the DME was updated, an updated tune with the new BIN ID.
The KW DDC's cost $4,700.
If it was me, I would 1000% buy Ohlins for $3,400 over anything KW. It will ride better and be a much higher quality dampener. You lose the EDC but honestly the EDC isn't programmed for the higher spring rates anyway.
Anything KW below KW motorsport dampeners are...
Probably wouldn't be super noticable as the much heavier M lites have the smaller cooling fins. If I had to guess, I think BMW/Toyota decided to put the larger cooling fin cover on the Supra because of the shorter wheel base which would make the car more tail happy compared to the longer wheel...
It's the cover they use on the M lites like M240i/M340i/M440i and now the 2026 Supra because the Final Edition can't use the normal Supra cover because the Z4 bracing won't clear the larger cooling fins.
You still need to ship it to them and then they bring it to FEMTO, so if you are going to a shipping place, why pay $700 extra for a rando carrying your DME?
So many people have shipped straight to FEMTO with no issues.