Specifications, wheels, installation and delivery — before you order.
Mounting hardware is sold separately. The selected configuration determines whether the ducktail spoiler is included.
Every SHIROKAI widebody is designed around a significantly wider wheel and tire setup.
Exact specifications depend on ride height, suspension, brake package and the look you're after.
Use our Wheel Fitment Calculator to find a recommended starting point for your build.
p.s. No you can't use your factory wheels with spacers, you will need 80-120mm spacers and it's just unsafe for public roads.
Professional installation is recommended.
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DIY installation approved.
SHIROKAI panels arrive CNC-trimmed and developed from 3D scans of the original body, reducing unnecessary fabrication compared to universal or cheap fiberglass kits.
Ready to wrap out of the box.
Fits without sanding or cutting. Paint prep (light sanding and primer) applies only if you paint.
Every build is slightly different. A skilled installer will always achieve the best result.
Every kit is carefully inspected before shipping and securely packaged for international transport.
Once dispatched, you'll receive tracking information.
For deliveries to the United States, import duties are included in the product price. Shipping is calculated separately at checkout.
Import duties and local taxes outside the US, if applicable, are determined by your country's customs regulations.
Browse our complete FAQ → or send us a message, we're happy to help!
Check your exact year and trim before ordering.
| Years | Trim | Fitment | Notes |
|---|---|---|---|
| 2018–2023 | Mustang GT | ✅ Direct fit | Developed specifically for GT models |
| 2018–2023 | Mustang EcoBoost | ✅ Direct fit | Direct fit with the factory bumper |
| 2018–2023 | Mustang Convertible | ⚠️ Partial fit | Kit fits, but the ducktail spoiler is excluded due to the different trunk lid |
| 2018–2020 | Shelby GT350 & non-GT bumpers | 🔧 Bumper check | Different front bumper: test-fit bumper endings first, no sanding or cutting |
| 2015–2017 | Mustang S550 Pre-Facelift | ❌ Different kit | Uses a different front fascia and requires the pre-facelift version |
| 2005–2014 | Mustang S197 | ❌ Different kit | Designed for a different Mustang generation |
Open the box. Lay every panel around the car. Take a step back. That photo is the first memory of your build.
Complete specifications, compatibility notes and additional product information.
Vehicle-specific 2018–2023 Ford Mustang S550 facelift widebody kit: plug-and-play fitment without weeks of sanding and cutting.
SHIROKAI S550 in the press:
See all SHIROKAI builds in the press
The SHIROKAI 2018–2023 Mustang S550 Widebody Kit is engineered for the facelift Ford Mustang S550 platform, giving GT and EcoBoost builds a wider stance, stronger side profile, and more room for an aggressive wheel and tire setup — while still following the factory body lines.
Fits 2018, 2019, 2020, 2021, 2022, 2023 Mustang GT/EcoBoost (facelift S550).
This is not just an overfender kit. Each SHIROKAI Mustang S550 widebody kit is CNC-cut from platform-specific 3D scan data for cleaner fitment, better proportions, and less fabrication drama during installation. Made from premium automotive ABS plastic, it brings the Kaiju feeling and keeps every line looking intentional.
2015–2017 (pre-facelift): sharp three-piece LED headlights with the vertical “gills”, flat hood with no vents, taller front bumper opening. 2018–2023 (facelift): slimmer lower-set headlights with tri-bar LED DRLs, hood with twin heat extractor vents, lower and wider bumper grille.
Have a 2015, 2016 or 2017 Mustang? See the 2015–2017 S550 widebody kit →
Looking for build ideas? See real cars in our widebody Mustang S550 gallery.
Front fenders add 3.54 in (9 cm) per side, rear fenders add 4.33 in (11 cm) per side, measured from the stock arch — run wider wheels and tires for more grip on road and track.
Confirmed fitment for 2018, 2019, 2020, 2021, 2022 and 2023 Ford Mustang:
| Year | Model | Fitment | Notes |
|---|---|---|---|
| 2018–2023 | Mustang GT | ✅ Direct fit | Vehicle-specific fit; test fitting and drilling are required |
| 2018–2023 | Mustang EcoBoost | ✅ Direct fit | Vehicle-specific fit; test fitting and drilling are required |
| 2018–2023 | Mustang Convertible | ⚠️ Partial fit | Kit fits, ducktail spoiler excluded (different trunk lid) |
| 2018–2020 | Shelby GT350 & non-GT bumpers | 🔧 Bumper check | Different front bumper: test-fit bumper endings first, no sanding or cutting |
| 2015–2017 | Mustang S550 pre-facelift | ❌ Different kit | See the S550 2015–2017 kit → |
| 2005–2014 | Mustang S197 | ❌ Different kit | See the S197 widebody kit → |
Not sure about your trim? Email i@shirok.ai — we confirm fitment within 24h.
All you need is steady hands and a heat gun — the kit is plug-and-play on GT/EcoBoost, with no weeks of sanding or cutting. With a growing community of SHIROKAI Mustang owners, this S550 kit became an absolute best seller and delivered strong results. If there’s a Mustang with a SHIROKAI kit at a show, it gets attention and love. Fitment is one of the biggest strengths of this wide body S550 setup — SHIROKAI is known for parts that fit straight out of the box, so you spend less time in the shop and more time driving. Whether you search for a mustang widebody, a mustang wide body build, or an S550 body kit, this keeps clean bodylines with a bold, planted look.
Dial in your exact setup with our Widebody Wheel Fitment Calculator.
Want to test our quality first? The ducktail spoiler is included in the full kit, and also sold separately — same ABS material, same fitment standard, fits 2015–2022 S550 trunk lids. See the S550 Ducktail Spoiler →
| Spec | Detail |
|---|---|
| Material | Automotive-grade ABS plastic |
| Manufacturing | CNC-cut from OEM 3D scan data |
| Front flare width | +3.54 in / +9 cm per side |
| Rear flare width | +4.33 in / +11 cm per side |
| Total added width | 180 mm total at the front; 220 mm total at the rear |
| Components | Kit components: front flares (2), rear flares (2), side skirts (2), bumper endings, front lip spoiler; ducktail spoiler only in the full-kit configuration |
| Mounting | Plug-and-play fitment on GT/EcoBoost — no weeks of sanding or cutting. Rivnut mounting; mounting hardware not included (sold separately) |
| Install time | 1–3 days at a body shop, excluding paint/wrap |
| Paint prep | Light sanding + primer recommended for best finish |
| Wrap compatibility | Yes, surface ready out of the box |
| Compatible vehicles | 2018–2023 Mustang GT/EcoBoost (plug-and-play), Convertible (kit-only), 2018–2020 GT350 (bumper check) |
| Body generation | S550 facelift (post-2018 redesigned front fascia) |
| Country of manufacture | Turkey (Bursa) |
| Support | Lifetime tech support from manufacturer |
For best results, professional installation is recommended. The finish wraps from the box (light sanding + primer for paint). Every Ford Mustang S550 widebody kit is built for style, function, and quality — the bold flares and precise fit take your Mustang to the next level.
Partially. The flares, side skirts, lip, and bumper endings all fit a 2018–2023 Convertible identically to the Coupe. However, the ducktail spoiler is excluded — Convertibles use a different trunk lid geometry that the spoiler doesn't match. Convertible owners typically order the kit without the ducktail spoiler option at checkout.
The GT350 (produced 2018–2020) uses a different front bumper than the standard GT, so we recommend a quick test fit of the bumper endings before install. No sanding or cutting of the flares, skirts or spoiler; all other panels fit identically to the GT. Note: GT350 production ended in 2020 — for 2020+ Mustangs above the GT, the GT500 uses a substantially different front-end and is not covered by this kit.
Yes. The 2018 facelift Mustang received a redesigned hood, headlights, and front fascia — so the kit requires a different front-section design. The actual flare and skirt dimensions are identical between the two S550 kits (180 mm total front width and 220 mm total rear width), but the bumper endings and front lip are platform-specific. If you have a 2015–2017, see our S550 2015–2017 widebody kit.
This S550 kit adds 180 mm of total width at the front and 220 mm at the rear (9 cm front and 11 cm rear per side). Our S197 kits add 180 mm total at the front and 240 mm at the rear (9 cm front and 12 cm rear per side). The slightly narrower S550 stance is intentional — it follows the S550's tighter factory body lines for a cleaner, OEM+ aggressive look rather than maximum-width drama. Both generations share the same 9 cm front-fender addition.
Typical body shop install takes 1–3 days (excluding paint/wrap), including test fit, drilling, and rivnut setup. The install requires drilling holes in the fender for rivnut-mounted flares — this is standard procedure for properly secured aftermarket widebody and shouldn't be attempted without the right tools.
Yes. The flares follow the factory door cutline. Both doors remain fully operable at any opening angle. The kit does not interfere with door handles, mirrors, or fuel filler door operation.
The added width supports significantly wider wheel and tire setups than stock — typically 19x11 or 20x11 wheels with 295–315 mm tires in the rear, and 19x10 with 275–285 mm tires up front depending on offset preference. Use our Widebody Wheel Fitment Calculator for precise sizing tailored to this kit.
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