Tesla Model 3 DM Performance - Autocross/Time Trial Build for USCA (Optima)

[Rexpelagi]

Did you squeeze 295s on the front? And how?

Actually it's really easy - the 295/25R19 is so short that it makes it easier than you would think. On the 19x10 ET35 it will fit but it's really close to the upright - with a few mm of spacer (for peace of mind) it's no problem.

 

[iridium]

I am trying to figure out the harness install on a 2022 M3P. Here is a pic looking at the front of the driver's seat, toward the door side. I don't see bolt to pop the side off. Did I miss it?

Also, I noticed this bolt at the back of the seat.. thought this could be mounting option:

 

[iridium]

Nevermind, I found it. Wasn't looking far enough forward on the seat.

Is there a second bolt to find?

 

[MasterC17]

Nevermind, I found it. Wasn't looking far enough forward on the seat.

Is there a second bolt to find?

Nope, just pull on the seat side trim (plastic clip) and then rotate towards the back of the car to pop off the frame.

 

[iridium]

Just wanted to confirm that these instructions worked fine on a 2022 M3P. Took me a bit to find everything, but it was straightforward after that.

 

[Yperformance]

Great post most helpful, any more observations please. Thanks

 

[NoDrama]

I'm using the one for a BMW E90. Note that it's not officially approved by Schroth, so use at your own risk.

To remove the headrest, follow these instructions:

To remove the rear seat bottom cushion, follow these instructions:

Additionally, here are some pictures of the install and how I mounted it.

For the front, you need to remove this bolt (underside front of the seat, door-side) - then the side panel can pop off:
View attachment 447972

Then you can mount the clip here:
View attachment 447974

Rear mount works on the seat belt bolt as normal:
View attachment 447979

Feed the belts through based on the video trick for the headrest:
View attachment 447977

Done!
View attachment 447973

I installed my Schroth Quick-Fit Pro harness yesterday. Thanks so much for the detailed directions. Just thought I'd highlight a couple differences from the above instructions which I encountered: The rear seat cushion in my 2022 M3P does not have the rear clips. The rear of the seat bottom just fits under the seat back. Also the two electrical connections are now both located in the same spot, on the driver's side of the car.