I remember reading about Performance (non-stealth) owners not having the top speed unlocked until their spoilers were installed. Also, remember that the stealth Performance came with 18" Michelin Primacy MXM4 tires that are likely not rated for the top Performance speeds. That's probably why Tesla locked the top speed. I'm sure a Service Center or mobile technician can unlock that speed with their laptop once they see the tire speed rating that are on the car.

 

I remember reading about Performance (non-stealth) owners not having the top speed unlocked until their spoilers were installed.

I remember people guessing that was the case, but I swear that I remember Elon saying that it was not required.

Also, remember that the stealth Performance came with 18" Michelin Primacy MXM4 tires that are likely not rated for the top Performance speeds.

The Tesla-specific MXM4 is speed-rated up to 168 mph, so that's not a problem.

https://www.anrdoezrs.net/click-100...ires/tires.jsp?tireMake=Michelin&tireModel=Primacy+MXM4&partnum=345WR8MXM4PXLV2

 

I can confirm that my Stealth goes 120mph. Is it unlocked to 162mph? Don't know, will never know (120 was scary enough). Like @garsh, I recall Elon saying that my Stealth would perform to the same limits as a P+.

 

I just remember when the Performance Model 3s first came out Tesla wasn't putting spoilers on them and would send mobile techs to install those on them some time later. I remember reading about owners getting the spoilers installed and the mobile tech then unlocking the top speed.

See this video from the well-known Bjorn Nyland where he installs the spoiler on his Performance Model 3 and then has to go to the Service Center to have them unlock the top speed. Skip to 10:15 for the relevant info

The top speed probably do not come locked on newer cars anymore, but if theirs is an older one it might still be locked. garsh is right that the MXM4 tires are rated for 168 MPH (W rating). I couldn't remember if they were rated V instead (149 MPH).

 

Oh yeah...so about that..... yes our car is locked out at 145 so far. We're doing a post on the Arkansas standing mile event soon in our sub-section. Some interesting things were found for sure! We do have Speed Rated tires on it now and a spoiler would be an easy add. Anybody in particular at a dealer we should talk to about an update? Our local dealer wasn't able to provide ANYTHING that our VIN didn't come with.