GR Supra Carbon Ceramic Brakes: What the Conversion Kit Is and Who It Makes Sense For
GR Supra carbon ceramic brakes aren’t something Toyota ever put on the car, which is exactly why this conversion gets so many questions. Triton Motorsports builds a carbon ceramic kit that replaces the factory iron brake setup on the A90/A91 Supra 3.0T, with the same 348x36mm front and 345x24mm rear sizes, and it’s listed as a direct replacement that needs no modifications. This guide covers what’s in the kit, how the discs are built, what it’s like to live with, and the honest case for and against paying for it.
The Short Answer
If you want the biggest single reduction in brake weight available for the Supra and you’re willing to pay for it, this is the kit. Across the car it takes 47.6 lb (21.6 kg) of rotating mass off the wheels, which is about half the weight of the factory iron discs. If you want better heat handling and a sturdier disc without the cost of carbon ceramic, the Supra two-piece floating rotor is the smarter buy. Which one is right depends on how you use the car, and we’ll walk through that below.
GR Supra Carbon Ceramic Brakes: What’s in the Kit
The Toyota GR Supra Carbon Ceramic Conversion Kit includes a set of front and rear carbon ceramic discs with their matching pads. The sizes match the sizes the factory discs use on the 3.0T:
The front disc is 348x36mm and the rear is 345x24mm. The hat is billet aluminum. The kit is listed for the A90/A91 Supra 3.0T, and it replaces factory part numbers 43516-WAA01, 43512-WAA02 and 42431-WAA01. Because the sizes match the factory discs, Triton lists it as a direct replacement for the iron setup with no modifications required. Your factory calipers stay on the car.
The 2.0 isn’t listed for this kit, so if you own a 2.0, send us your VIN before you order and we’ll check.
How the Discs Are Built
Triton’s Gen 3 carbon ceramic discs use continuous, long carbon fibers in a 3D bonded structure, rather than the shorter chopped fibers used in many factory carbon ceramic discs. The longer fibers are meant to hold up better to repeated heat cycles. If you want the full breakdown of how different carbon ceramic discs are made and why it matters, our guide to CCM vs CCB-S vs CCB-H goes through it in detail.
What Changes When You Go From Iron to Carbon Ceramic
Weight. This is the headline. The factory brakes on the Supra are iron, and carbon ceramic discs are much lighter. The factory front disc weighs 27.6 lb (12.5 kg) and the carbon ceramic front weighs 12.8 lb (5.8 kg). At the rear it’s 18.5 lb (8.4 kg) against 9.5 lb (4.3 kg). Rotor weight sits at the wheel, where it counts for more than weight anywhere else on the car, because the suspension and the brakes have to control it on every bump and every stop.
Factory iron | Triton carbon ceramic | Difference | |
Front disc | 27.6 lb (12.5 kg) | 12.8 lb (5.8 kg) | 14.8 lb (6.7 kg) lighter, 53.6% |
Rear disc | 18.5 lb (8.4 kg) | 9.5 lb (4.3 kg) | 9.0 lb (4.1 kg) lighter, 48.6% |
All four corners | 92.2 lb (41.8 kg) | 44.6 lb (20.2 kg) | 47.6 lb (21.6 kg) lighter, 51.6% |
Dust. Carbon ceramic setups with matched pads tend to put far less dust on your wheels than iron rotors with performance pads. If you’ve been cleaning the wheels more than you’d like, it’s one of the changes owners notice first.
Heat. Carbon ceramic discs are built for repeated hard stops, which is why they show up on track-focused cars. They’re a different material from iron, with their own strengths and their own failure modes that are worth knowing about. Our stopping distance breakdown covers what actually changes and what doesn’t.
Pedal feel. Reviews on the kit’s product page mention a refined brake feel and better consistency. Your experience will depend on the pads, the bedding and how you drive, which is why the next two sections matter.
Pads and Bedding
The kit includes pads matched to the discs, and that’s not a detail to skip. Carbon ceramic discs need carbon ceramic pads, and a pad made for iron rotors isn’t a substitute. Our guide to semi-metallic vs ceramic vs carbon ceramic brake pads explains why.
New discs and pads also need a proper bed-in, and the procedure for carbon ceramic differs from an iron bedding cycle. Our bedding guide walks through it. Skipping this step is one of the most common reasons a good set of discs feels off.
Your GR Supra Brake Options Side by Side
Here’s how the two Triton options compare, using the specs on the product pages. The factory setup is iron, so it’s the baseline for both.
Two-piece floating iron | Carbon ceramic conversion | |
Front disc | 348x36mm | 348x36mm |
Rear disc | 345x24mm | 345x24mm |
Disc material | G3500 high carbon iron alloy | Carbon ceramic |
Hat | Billet aluminum | Billet aluminum |
Pads included | No | Yes, matched pads |
Fitment | A90/A91 3.0T | A90/A91 3.0T |
Lead time | About 35 days | About 45 days |
Warranty | 1 year / 36,000 miles | 1 year / 36,000 miles |
Price | From $941 | $9,998 |
Both keep the factory calipers and both use the sizes the factory discs use. The real differences are the disc material, whether pads come with it, how long you wait, and what you spend.
Why Rotor Weight Matters More Than Weight Elsewhere
A pound off a brake disc isn’t the same as a pound out of the trunk. The disc is part of the rotating and unsprung mass at the wheel, which means the engine, the brakes and the suspension all have to deal with it. Every time the wheel hits a bump, the dampers have to control that mass. Every time you accelerate, the wheel has to spin it up, and every time you brake, the brakes have to slow it down. Taking weight off there tends to show up in how quickly the car responds, in a way that removing the same weight from inside the cabin doesn’t.
That’s the reason the weight number is the headline for carbon ceramic, and it’s also why it isn’t the only number that matters. If your car already feels sharp enough and your real complaint is dust or fade, the answer might be a different part.
Carbon Ceramic or Floating Iron: Which One for Your Supra?
Be honest about how you use the car, and the answer gets easy.
Choose carbon ceramic if you want the largest weight reduction available, you care about wheel dust, and you’re comfortable with the price of the kit. At $9,998 it’s a serious purchase, and it makes the most sense for owners who’ve already tuned the car and want the brakes to match.
Choose the floating iron rotors if your priorities are heat management, durability and value. The Supra two-piece floating rotor uses a billet aluminum hat with a G3500 high carbon iron alloy disc, in the same 348x36mm front and 345x24mm rear sizes. The front disc weighs about 25 lb (11.3 kg) against 27.6 lb (12.5 kg) for the factory disc, so the weight saving is modest compared with carbon ceramic. It costs a fraction of the carbon ceramic kit, it lets the disc expand independently of the hat under heat, and you can pair it with the pad compound of your choice. For most Supra owners who track the car a few times a year, it’s the sensible choice.
If you’re somewhere in between, start with the floating rotors. The carbon ceramic kit will still be there when you want it.
Who Should Skip It
If your Supra is a daily driver that sees a few spirited drives and nothing more, the carbon ceramic kit is probably more brake than you need, and the money may do more for you somewhere else, like tires or a good set of pads. If you plan to keep the car stock and sell it with the factory parts on, remember that you’d be putting an aftermarket system on it. And if you’re sensitive to lead times, the 75-day turnaround is worth planning around.
The kit is for owners who’ve thought about it and want the best brake setup this platform can take without changing calipers. If that’s you, it’s a strong choice.
Installation and First Drive
The kit is listed as a direct replacement for the factory iron setup, with no modifications required, so the fitment side is straightforward: new discs and pads go where the factory ones were, behind the factory calipers. Have it done by someone comfortable with brake work, and make sure they use the torque specifications for your car from Toyota’s service documentation instead of estimating them.
After the install, bed the discs and pads in using the carbon ceramic procedure before you drive the car hard. It takes a short, careful session of moderate stops, and it’s the step that decides whether the pedal feels right for the life of the set.
What the Kit Doesn’t Do
It’s not a big brake kit. You keep your factory calipers, so the clamping hardware doesn’t change. Stopping power from a bigger caliper and bigger discs is a different upgrade. What this kit changes is the material of the disc and the weight that comes with it.
It also isn’t a set-and-forget part. Carbon ceramic discs are inspected differently than iron rotors, and they can’t be resurfaced when they wear. Our guide to carbon ceramic brake refurbishing vs replacement explains why replacement, not refurbishing, is the right fix when the time comes.
Ordering: Lead Time, Warranty and Returns
These discs are built to order, and the listed turnaround time is about 75 days, so plan around that. The kit carries a one-year, 36,000-mile warranty against manufacturer defects, which excludes improper installation, use on the wrong platform and external damage, and isn’t a road hazard warranty. Only unopened, unused rotors can be returned, and a 20% restocking fee plus shipping applies.
The order form asks for your model and year, so we can confirm the right kit before anything is built.
Frequently Asked Questions
Do GR Supra carbon ceramic brakes fit the factory calipers?Yes. The kit is a direct replacement for the factory iron discs in the same sizes, and the factory calipers stay on the car.
Which Supras does the carbon ceramic kit fit?It’s listed for the A90/A91 GR Supra 3.0T. The 2.0 isn’t listed, so contact us with your VIN before ordering.
How much lighter are carbon ceramic brakes on the GR Supra?The front disc drops from 27.6 lb (12.5 kg) to 12.8 lb (5.8 kg), and the rear from 18.5 lb (8.4 kg) to 9.5 lb (4.3 kg). Across all four corners that’s 47.6 lb (21.6 kg) less rotating mass, about 52% lighter than the factory iron discs.
Do the carbon ceramic discs come with pads?Yes, the kit includes a set of front and rear discs with the matching pads.
Are carbon ceramic brakes worth it on a GR Supra?It depends on how you use the car. They give you the largest weight reduction and very little dust, but they cost far more than a floating iron rotor upgrade. If you’re not chasing every last pound, the floating rotors are the better value.
Can I use regular brake pads with carbon ceramic discs?No. Carbon ceramic discs need pads made for them, and the kit includes the right ones.
How long does it take to get the kit?The listed turnaround time is about 75 days, since the discs are built to order.
What’s the warranty?One year or 36,000 miles, whichever comes first, against manufacturer defects.
The Bottom Line
GR Supra carbon ceramic brakes are a real upgrade for a specific owner: someone who wants the lightest brake setup available, less dust, and doesn’t mind the price or the lead time. For everyone else, the floating iron rotor is the better value. Either way, you keep your factory calipers and the swap is designed to be direct.
Shop the GR Supra Carbon Ceramic Conversion Kit or contact us with your VIN and we’ll confirm fitment.
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