lots of conflicting information on this topic. Most of it seems to be guess work so I thought that I would explore the options. The aftermarket companies seem to have engineered a retrofit bumper and charge a lot for it...about $3,300 + tax (that includes shipping. You need to source your own top grill so add another $200 or so, to make it right. This seems like a LOT when you consider that a bumper straight from Tesla is about 500.00.
They will tell you that all of the mounting points are different, and the most recent feedback I had was that the hood was 2" longer and it simply wouldn't fit....seemed like a LOT of work and contrary to what any logical upgrade would be in this kind of format - maximum affect, but try to avoid retooling etc. So, I found a used bumper in the same color as my car for 300.00 and thought what could it hurt.
So, its true that the mounting points are different, BUT its NOT true that the hood is different, at least from the preliminary fitting. I have a contact at a Tesla approved facility that claims correct factory parts would set you back about 3800.00 and then fitting and painting would set you back another 1500.00 - in my case. The parts would include, rad mounts, ducting, grills etc. From there, its somewhat plug and play.
I have a shop willing and very capable of doing custom work to make it fit. This is not to be confused with a duct tape install; rather they are a true custom shop that works on the likes of Ferraris Lambo, Bentleys and of course, Teslas. Its still early in the build, but no clear signs that its not possible. Because there are so many differing opinions on this, I will report back with the progress as it develops...which leads me to the other facelift...the headlights.
After carefully reviewing and researching the topic, I don't recommend it at all! First buy the lights and plug em in and they are non-returnable. Second, all signs point to a CANBUS system. Unlike the pre-2016.5 build cars, the headlight has logic built into and extra wires and signals coming from the cars ECM. This means its a hardware and software problem - and without access to both, NO ONE will be able to get these lights to work. Short of cracking them open and dumbing them down to an analog format its kind of a waste; there would be no improvement. Instead, I purchased a fully optioned set of lenses from Evan over at Vision Auto Lab. Not only are they esthetically beautiful lights, they are a HUGE improvement on the stock lighting - if you're going to update your car, this would be the best place to go - quality!!!