Vendor GiroDisc 370mm Rotors for GM Brembo 6-Pot Calipers

It takes a village to raise a kit. This one is TMC's very own. @Lukez pioneered the 6-piston CTS-V DIY for the Model S. Then @jesse_le prototyped a rotor with GiroDisc for the Model 3 and Y. These full-floating slotted GiroDisc rotors for the Model 3 and Y come in at 370mm x 34mm. This mirrors the rotor size on the Cadillac CTS-V, Corvette C7 Z06, and other GM performance vehicles allowing fitment of massive GM 6-piston Brembos. For comparison, the OEM Model 3 Performance 2-piece rotor measures in at 355mm x 25mm while the OEM 1-piece "Base" Rotor measures a paltry 320mm x 25mm.

The GiroDisc rotors differentiate themselves from other manufacturers with U.S. sourced iron and beautifully anodized U.S.-sourced 6061-T6 aluminum rotor hats. The hat is also 4mm thicker than OEM which helps clear the unique stepped hub of the Model 3 Performance and obfuscates the need for small wheel spacers. The GiroDisc is also a true 2-piece rotor allowing you to replace the rings without need to replace the hats.

OEM GM Brembo 6-piston Calipers​

The GiroDisc rotors allow you to mount OEM GM Brembos from a number of GM performance vehicles including the ATS-V, CTS-V, and C7 Corvette Z06. These are lightweight 6-piston monoblock aluminum calipers that are optimized for cooling, specified as "low drag", and are designed to fit under 18" wheels. They mount up to the OEM Tesla front knuckle by either drilling out your caliper mounting holes to accept M14 caliper bolts or re-threading the caliper to accept the OEM Tesla M12 hardware. The latter allows you to return the vehicle completely to stock.

Another benefit of the GM 6-piston Brembos is a wide assortment of available brake pads. If you have ever searched for brake pads for the stock Model 3 Performance calipers you know that the selection for this seemingly proprietary caliper can be somewhat limited. The GM calipers feature a standard FMSI D1405 pad shape which opens up pad options from $64 Centric OE replacement street pads up to $700+ Ferodo DSUNO race pads.

Ordering​

As these are a relatively new offering, GiroDisc requires a minimum of 5 rotor pairs to make a production batch. Pricing is $1,200 per pair with free shipping to the continental U.S. There is an approximate 4 to 6 week lead time from the batch order for fulfillment. There is already some interest in the next batch and my hope is that the demand is strong enough for these to become regular stock at Emotive Engineering.

... and introducing... The EmotiVetted GM 6-Pot Bolt-on BBK​

This is a full bolt-on affair which allows you to reuse your factory caliper mounting bolts (brake dust shield removal required).

Street Kit - $2,649

• CTS-V Calipers - Silver (or optional Yellow) - re-threaded to accept factory Tesla caliper bolts
• GiroDisc 370mm 2-Piece Rotors
• DBA SP500 Street Performance Pads - copper-free ceramic pads, low-noise, and low-dust. Everything an OE+ street pad should be.
• Spiegler Stainless Steel Brake Lines
• OE GM Caliper Hardware

Track Kit - $2,899

• C7 Corvette Z06 Calipers - Red - re-threaded to accept factory Tesla caliper bolts
• GiroDisc 370mm 2-Piece Rotors
• G-LOC R12 Track Pads - amazing pedal modulation, rotor friendly, at the expense of some noise and dust.
• Spiegler Stainless Steel Brake Lines
• OE GM Caliper Hardware

Not ready to go full on BBK? Emotive Engineering is an authorized GiroDisc dealer offering a full line of OE-replacement 2-piece rotors for your Tesla Model 3 or Y.

 

[jesse_le]

Hi, what is the torque required on the corvette bolts?

Caliper Bolts: 129 ft-lb
Caliper Bridge Bolt: 24 ft-lb
Caliper Bleeders: 10 ft-lb
Brakeline Banjo bolt: 36 ft-lb

 

[daniloreyes]

OMG
I installed the BRAKES...
There are other threads that do not show the amazing difference these brakes make.

For instance, I was under the impression that the pads difference was only 10mm in the tall dimension.
THE PADS ARE HUMOMGOUS.

The car performs very well, smooth and quiet.... (using stock GM Brembos.)

This mandatory picture will make you buy it.
My car had the RB Big Model S Calipers conversion, and they look so tinny...

Look at the difference!!!

Is obvious but to the left, Corvette Pad, and to the right the Model S caliper and pads, that I just removed (from my model 3 performance) AND that model s pad is the same as my previous car that had Brembo (Mitsubishi EVO )

I'm now sorry I didn't install it earlier..


Cheers.
-Danilo

 

[PrincessStela]

brake pads. https://www.amazon.com/gp/product/B00559PCI6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

These will work with the CTS-V version too, right?

 

[vietfella]

These will work with the CTS-V version too, right?

These work with the cts-v version

 

[drpheta]

Thanks again Jesse for putting this together for us to kick it off last year.

Figured I'd give an update after half a summer, a full fall, full winter, and just starting this spring. These brakes have been fantastic. I've been hard on them lately, and they're super smooth and quiet. Took them around on some spirited back roads without any complaints from them.

Running the stock GM Brembo pads, and they're really dusty. Going to get something better for Palmer later this spring or summer.

 

[kirkusss]

Anyone noticing some flex of the caliper during bleeding? I just wonder if it's normal of if I have a problem with center allignement (have done my own rotor hats).

 

[Lindenwood]

Given how prevalent this caliper is I would be surprised if it had significant design faults (I.e. any flex that wasn’t deliberate).

One note: I am starting to get lips outside of the edges of the pads after a good amount of hard use! I’d expect to replace the rotors perhaps after the 2024 season.

 

[drpheta]

Given how prevalent this caliper is I would be surprised if it had significant design faults (I.e. any flex that wasn’t deliberate).

One note: I am starting to get lips outside of the edges of the pads after a good amount of hard use! I’d expect to replace the rotors perhaps after the 2024 season.

View attachment 953225

How much track use did you run this season? That's some heavy braking.

Imagine if GiroDisc gave us the option to replace the iron ring with carbon ceramic. That might save you if you're not exclusively doing AutoX

 

[Lindenwood]

How much track use did you run this season? That's some heavy braking.

Imagine if GiroDisc gave us the option to replace the iron ring with carbon ceramic. That might save you if you're not exclusively doing AutoX

This was 12 AutoX runs with FTD being around 35 seconds. My pads are just really dusty .

 

[PrincessStela]

Thought I’d add to the knowledge gained on this thread. Thanks to @jesse_le for the Spiegler brake line info. I went with his suggestions, (711 fitting to 029 and 711 to 039) except I decided to go with 610 mm length. Cost was $145.93 and it was to my door in 2 days. I also reused the stock hose clamp, just removed and placed on the new lines. Hope this helps.

I'm going with 610mm just want to make sure no issues with that?

 

[PrincessStela]

@KTomsky My apologies - I thought I had listed the specs earlier.

The front brake lines are side specific as the banjo fitting is mirrored.

Driver Side
Banjo Fitting: 029
Hardline Fitting: 711
Length: 588MM
Jacket Color: Smoke

Passenger Side
Banjo Fitting: 039
Hardline Fitting: 711
Length: 588MM
Jacket Color: Smoke

Rear Kit Part Number: 13.02.10700 with matching jacket color.

Though I haven't installed them on the actual car, I did a test fitment on my spare knuckle, and they look good.

I believe the OEM and even aftermarket SS lines are close at 533MM long, so it should be plenty at 588MM + the banjo elbow.

If you need more pics of my setup, please let me know and I'll go snap some.

588 is best or 610mm? For length from Spiegler

 

[slzeal]

588 is best or 610mm? For length from Spiegler

I believe you can buy the specific Spiegler brake lines from Emotive

Spiegler Stainless Steel Brake Lines - Tesla Model 3 / Y GM Brembo 6-piston Retrofit

Stainless steel brake lines for the Tesla Model 3 DIY GM Brembo Retrofit / EmotiVetted BBK.

emotive.engineering

 

[Lindenwood]

I would get the slightly longer lines. Using factory length MPP lines on my 6-pots, and actually was able to get the mounting bracket installed in the factory location with some massaging, but an extra 22mm would be better.

 

[hyp36rmax]

I need to head in to the shop for more photos this weekend, but ready to offer this up as a kit for those who do not want to fill their garage with metal shavings while re-threading the calipers or shopping around for parts. Still working on a more elegant bracket solution for the Spiegler lines. Having these ready to accept the factory M12 caliper bolts makes install a breeze. As we have already had photos confirm, there is plenty of room under 18" wheels - APEX EC-7 pictured.

View attachment 858741
View attachment 858742

Street Kit - $2,649
CTS-V Calipers - Silver (or optional Yellow)
DBA SP500 Street Performance Pads - copper-free ceramic pads, low-noise, and low-dust. Every thing an OE+ street pad should be.

Track Kit - $2,899
C7 Corvette Z06 Calipers - Red
G-LOC R12 Track Pads - amazing pedal modulation, rotor friendly, at the expense of some noise and dust.

Product pages will be up on the site next week. All kits will include re-threaded calipers to accept your factory caliper bolts. The hardest part will be removing your dust shields, which require just a couple of cuts with tin snips and a little muscle. Also included are the all important GiroDisc 370mm rotors, Spiegler stainless steel brake lines, and all caliper hardware. The default Track and Street Kits are for those who just want to hit the easy button. If you want to source specific calipers/caliper colors, pads, or brake line colors just reach out. Custom color powdercoating is an additional $500 - hope to have an example soon.

The longest lead time right now is another rotor production run. Expect 4 to 6 weeks after that production order is made at which point I will keep some rotors and kits in stock.

I'm so close to hitting check out. The only difference between Street and Track is caliper color and pads?

 

[MacO512]

What are best options for rear brakes if getting the front track kit with R12 pads? I'm considering some of these options all with R12/10 pads;

1 Stock Model 3 Performance Rotors/Calipers
2 Upgraded Rotors - stock M3P size with stock M3P calipers
3 Larger rotors - bracket to use M3P calipers - I don't see why this would be better than option 2 since the pads are the same size.
4 Larger rotors - Model S Calipers
5 Any other recommended options?

For Rear Pads - I'd have thought it would be best to match R12 in the back if they are up front since the rear pads and rotors are already smaller. Plus the identical compounds would seem to me to have better front/rear bias and consistent feel. But often I see a suggestion of R10 in the rear with R12 up front. Would anyone consider using R12 in both the front and rear? Or if not any details of why not would be appreciated.

 

[drpheta]

I'm so close to hitting check out. The only difference between Street and Track is caliper color and pads?

I believe Emotive made their track kit include the Corvette calipers, which have dimpled pistons for better heat management, along with track specific pads.

 

[drpheta]

What are best options for rear brakes if getting the front track kit with R12 pads? I'm considering some of these options all with R12/10 pads;

1 Stock Model 3 Performance Rotors/Calipers
2 Upgraded Rotors - stock M3P size with stock M3P calipers
3 Larger rotors - bracket to use M3P calipers - I don't see why this would be better than option 2 since the pads are the same size.
4 Larger rotors - Model S Calipers
5 Any other recommended options?

For Rear Pads - I'd have thought it would be best to match R12 in the back if they are up front since the rear pads and rotors are already smaller. Plus the identical compounds would seem to me to have better front/rear bias and consistent feel. But often I see a suggestion of R10 in the rear with R12 up front. Would anyone consider using R12 in both the front and rear? Or if not any details of why not would be appreciated.

Just get rotors (MPP slotted), stainless brake lines, pads.

 

[Lindenwood]

What are best options for rear brakes if getting the front track kit with R12 pads? I'm considering some of these options all with R12/10 pads;

1 Stock Model 3 Performance Rotors/Calipers
2 Upgraded Rotors - stock M3P size with stock M3P calipers
3 Larger rotors - bracket to use M3P calipers - I don't see why this would be better than option 2 since the pads are the same size.
4 Larger rotors - Model S Calipers
5 Any other recommended options?

For Rear Pads - I'd have thought it would be best to match R12 in the back if they are up front since the rear pads and rotors are already smaller. Plus the identical compounds would seem to me to have better front/rear bias and consistent feel. But often I see a suggestion of R10 in the rear with R12 up front. Would anyone consider using R12 in both the front and rear? Or if not any details of why not would be appreciated.

Are you not considering the Girodisc rotors with Brembo calipers that are the subject of this thread?

 

[MacO512]

Are you not considering the Girodisc rotors with Brembo calipers that are the subject of this thread?

I'm planning to get those for the front brakes. My question was what to get for the rear.

 

[Lindenwood]

I'm planning to get those for the front brakes. My question was what to get for the rear.

Sorry I’m an idiot.

What are best options for rear brakes if getting the front track kit with R12 pads? I'm considering some of these options all with R12/10 pads;

1 Stock Model 3 Performance Rotors/Calipers
2 Upgraded Rotors - stock M3P size with stock M3P calipers
3 Larger rotors - bracket to use M3P calipers - I don't see why this would be better than option 2 since the pads are the same size.
4 Larger rotors - Model S Calipers
5 Any other recommended options?

For Rear Pads - I'd have thought it would be best to match R12 in the back if they are up front since the rear pads and rotors are already smaller. Plus the identical compounds would seem to me to have better front/rear bias and consistent feel. But often I see a suggestion of R10 in the rear with R12 up front. Would anyone consider using R12 in both the front and rear? Or if not any details of why not would be appreciated.

Probably option 3, mostly because they are bolt-on and there are pretty solid aftermarket options available. The larger rotors from Option 3 is better than Option 2 because increasing rotor volume increases both the heat absorption rate into the rotors (from friction with the pads) and the heat loss rate (from conductive cooling through the vanes).