Looks like a reboot of LHLabs.com
While you drive the world’s best electric vehicle, you should be listening to the world’s best stereo.
I have their amp and door speakers and upgraded my UHFS.
I'm pretty pleased with the product, although I definitely recommend
against their sub. Get a soundqubed 8" 2ohm (wired to 1ohm) and put it into the stock sub enclosure.
https://www.amazon.com/gp/product/B00TA2WW3M/ref=od_aui_detailpages00?ie=UTF8&psc=1
If you'd like to hear mine, I'm in socal too, and I'd be happy to demo it for you
As far as installation. I recommend Calibred Customs. Johnnie B.
Calibred Customs - Downtown - Los Angeles, CA
Let him know I referred you. He's awesome and very familiar with Tesla's.
BTW a word of warning. THey are HORRIBLE with support and followup and follow through, but once you get your working stuff, it works really well.
EDIT: Looks like the kit you liked above is not the UHFS upgrade I was describing, so disregard the the I posted regarding their sub etc.