The short answer: a GR Yaris carbon fiber body kit is a set of exterior panels — front lip or splitter, side skirts, rear diffuser, spoiler, mirror caps and canards — that replace or overlay the factory plastic parts. On a Toyota GR Yaris the two generations need different parts: the MK1 (2020–2023, GXPA16) and the facelifted MK2 (2024 onward) have different front bumpers, grille geometry and interior trim, so panels are not interchangeable. A full kit typically saves 4–8 kg over OEM plastic, sharpens aero balance at speed, and — if it is autoclave-cured prepreg rather than fiberglass with a carbon-look wrap — holds its finish for years. Buy the front lip and rear diffuser first: they change the car’s stance most and cost the least.
MK1 vs MK2: why the generation matters
The GR Yaris was never a cosmetic exercise. It was homologated for rally, built on its own GA-B/GA-C hybrid platform with a bespoke three-door shell, and every panel on it exists for a reason. That makes fitment unusually unforgiving.
The 2024 facelift (MK2) revised the front bumper aperture, the lower grille and the intercooler ducting, and reworked the dashboard and centre console entirely. As a result:
- Front lips, splitters and canards are generation-specific. An MK1 lip will not sit correctly on an MK2 bumper.
- Rear diffusers and spoilers are largely shared in concept but differ in mounting. Always check the model year.
- Interior trim is completely different. The MK2 dashboard layout means MK1 interior panels do not transfer.
- Mirror caps, side skirts and wide arches are the most commonly cross-compatible items, but confirm before ordering.
Shop the correct generation directly: GR Yaris MK1 carbon fiber parts and GR Yaris MK2 carbon fiber parts.
What is actually in a GR Yaris carbon fiber body kit
There is no single industry definition of body kit, so here is what the term covers in practice, from most to least transformative.
Front lip / splitter
The single highest-impact part. It lowers the visual centre of gravity, tightens the front overhang and, on a splitter design, generates measurable front downforce above roughly 120 km/h. It is also the part most likely to meet a kerb — which is an argument for real carbon over brittle fiberglass. See the full range of carbon fiber front lips and splitters.
Rear diffuser
Cleans up airflow leaving the underbody and balances the downforce the front lip adds. Fitting a splitter without a diffuser can make a car feel nervous at the rear at speed. Browse carbon fiber rear diffusers.
Rear spoiler
The GR Yaris already carries a factory roof spoiler. A carbon replacement drops weight from the highest point on the car — the most valuable kilogram you can remove — and lets you choose a more aggressive profile. See carbon fiber rear spoilers.
Side skirts and wide arches
Skirts visually lengthen the car and control side airflow. Wide arches are a bigger commitment: they change track width appearance and usually accompany a wider wheel and tyre package.
Mirror caps, canards and trim
Low-cost, high-visibility. Carbon fiber mirror caps are the most common entry point into a build — they take fifteen minutes and set the tone for everything that follows.
Engine bay and interior
Intake covers, engine covers, dashboard trim and paddle shifters. On the GR Yaris the engine bay is unusually visible at shows, and a carbon intake system is one of the few cosmetic parts that also affects intake air temperature.
Prepreg carbon, forged carbon, or neither
This is where most buyers get it wrong, so it is worth being precise.
Prepreg carbon fiber is woven fabric pre-impregnated with a controlled amount of epoxy resin, laid into a mould by hand and cured in an autoclave under both heat and pressure. The pressure squeezes out excess resin and collapses air voids, producing the highest stiffness-to-weight ratio and a crisp, even weave under clear coat. This is the aerospace and motorsport standard.
Forged carbon uses short chopped fiber tows compression-moulded under heat rather than a continuous woven sheet. The result is a marbled, non-repeating texture and the ability to form complex three-dimensional shapes that a woven sheet cannot follow without wrinkling. It is not a cheaper imitation of woven carbon — it is a different process with different capabilities. Explore forged carbon fiber parts.
Fiberglass with a carbon-look finish is the trap. It is heavier than carbon, far less stiff, and the printed or wrapped pattern delaminates and yellows under UV. RSI c6 does not make fiberglass parts — no fiberglass, ever.
| Prepreg carbon | Forged carbon | Fiberglass carbon look | |
|---|---|---|---|
| Weight vs OEM plastic | Lightest | Light | Heavier |
| Stiffness | Highest | High | Low |
| Texture | Uniform woven weave | Marbled, unique per part | Printed or wrapped |
| Complex 3D shapes | Limited | Excellent | Good |
| UV durability | Excellent under clear coat | Excellent under clear coat | Poor — yellows, peels |
Weight, aero and what to expect in the real world
Be realistic about numbers. A full exterior carbon kit on a GR Yaris typically removes 4–8 kg depending on how many panels you replace. On a 1,280 kg car that is measurable but not transformative on its own — roughly a 0.5% weight reduction. What matters more is where the weight comes off: a carbon spoiler and bonnet reduce mass high up and ahead of the axle, which affects how the car changes direction more than the raw figure suggests.
Aerodynamically, a matched splitter-and-diffuser package is the honest upgrade. Front downforce without rear balance is worse than stock. If you are building for track use, fit them together.
Buying order: what to do first
- Mirror caps — lowest cost, immediate visual change, no fitment risk.
- Front lip or splitter — the biggest single change to the car’s stance.
- Rear diffuser — completes the aero balance the lip started.
- Rear spoiler — weight off the highest point on the car.
- Side skirts and arches — the wide-body commitment.
- Interior and engine bay — finish the build.
Every RSI c6 part is designed, produced and hand-finished in Italy, autoclave-cured, and made to order — which means your part is laid up for your car rather than pulled from a warehouse shelf. We ship worldwide.
Start browsing: all Toyota carbon fiber parts or the complete range of carbon fiber body kits.
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FAQ
✅ Will an MK1 GR Yaris body kit fit an MK2?
Front bumper parts, canards and interior trim will not. Mirror caps, side skirts and some rear components often will, but you should confirm generation compatibility before ordering rather than assume it.
✅ How much weight does a carbon fiber body kit save on a GR Yaris?
Typically 4–8 kg across a full exterior kit, depending on how many panels are replaced. Individual parts save between 300 g and 2 kg each versus the OEM plastic equivalent.
✅ Is forged carbon weaker than woven carbon fiber?
No. Forged carbon uses randomly oriented short fibers, so it lacks a woven sheet directional strength, but it is isotropic — equally strong in all directions — and excels in thick, complex shapes where woven fabric would wrinkle. Different tool for a different job.
✅ Do carbon fiber parts need special care?
Yes, mainly UV protection. Clear-coated carbon should be washed with pH-neutral shampoo and protected with a ceramic or sealant product. See our carbon fiber care and protection range.
✅ Are these parts road-legal in Europe?
Cosmetic overlay panels that do not alter vehicle dimensions or lighting are generally accepted, but rules differ by country, and wide arches or protruding splitters may require homologation or inspection. Check your local regulations before fitting.