• 2018-2023 Mustang Widebody Kit | S550 GT | SHIROKAI 2018-2023 Mustang Widebody Kit | S550 GT | SHIROKAI
  • Widebody Ford Mustang with custom body kit and aggressive front bumper on white background Widebody Ford Mustang with custom body kit and aggressive front bumper on white background
  • Ford Mustang S550 widebody kit SHIROKAI installed on beige sports car parked in empty lot Ford Mustang S550 widebody kit SHIROKAI installed on beige sports car parked in empty lot
  • Ford Mustang S550 widebody kit SHIROKAI installed on beige sports car with aggressive styling and black wheels Ford Mustang S550 widebody kit SHIROKAI installed on beige sports car with aggressive styling and black wheels
  • Ford Mustang S550 with SHIROKAI widebody kit featuring aggressive front bumper and aerodynamic vents Ford Mustang S550 with SHIROKAI widebody kit featuring aggressive front bumper and aerodynamic vents
  • Ford Mustang S550 widebody kit SHIROKAI installed on a black Mustang with aggressive front fender flare and custom wheel Ford Mustang S550 widebody kit SHIROKAI installed on a black Mustang with aggressive front fender flare and custom wheel
  • Ford Mustang S550 widebody kit SHIROKAI on black sports car with green racing stripes and large rear wing Ford Mustang S550 widebody kit SHIROKAI on black sports car with green racing stripes and large rear wing
  • Ford Mustang S550 with tan SHIROKAI widebody kit parked on street under clear sky Ford Mustang S550 with tan SHIROKAI widebody kit parked on street under clear sky
  • Ford Mustang S550 widebody kit SHIROKAI black components set for exterior car modification Ford Mustang S550 widebody kit SHIROKAI black components set for exterior car modification
  • Black Ford Mustang S550 with red rims featuring Ford Mustang S550 widebody kit SHIROKAI installed outdoors Black Ford Mustang S550 with red rims featuring Ford Mustang S550 widebody kit SHIROKAI installed outdoors
  • Black Ford Mustang S550 with widebody kit SHIROKAI and red rims parked in urban graffiti setting Black Ford Mustang S550 with widebody kit SHIROKAI and red rims parked in urban graffiti setting
  • Black Ford Mustang with yellow racing stripes featuring Ford Mustang S550 widebody kit SHIROKAI front view Black Ford Mustang with yellow racing stripes featuring Ford Mustang S550 widebody kit SHIROKAI front view
  • Close-up of Ford Mustang S550 widebody kit SHIROKAI matte black fender with rivet details Close-up of Ford Mustang S550 widebody kit SHIROKAI matte black fender with rivet details
  • Ford Mustang S550 widebody kit SHIROKAI installed on bronze car with lowered stance at night cityscape Ford Mustang S550 widebody kit SHIROKAI installed on bronze car with lowered stance at night cityscape
  • Ford Mustang S550 widebody kit SHIROKAI installed on brown car with custom wheels and lowered stance Ford Mustang S550 widebody kit SHIROKAI installed on brown car with custom wheels and lowered stance
  • Rear view of Ford Mustang with Ford Mustang S550 widebody kit SHIROKAI parked at night in cityscape Rear view of Ford Mustang with Ford Mustang S550 widebody kit SHIROKAI parked at night in cityscape
  • Ford Mustang S550 widebody kit SHIROKAI installed on bronze muscle car parked at night in city Ford Mustang S550 widebody kit SHIROKAI installed on bronze muscle car parked at night in city
  • Ford Mustang S550 widebody kit SHIROKAI installed on a sleek black car parked at night in an urban setting Ford Mustang S550 widebody kit SHIROKAI installed on a sleek black car parked at night in an urban setting

2018-2023 Mustang Widebody Kit | S550 GT | SHIROKAI

$4,900.00
Shipping calculated at checkout.
Estimated shipping:
🇺🇸 USA: approx $600
🇪🇺 Europe: approx €400
🌍 Other regions: calculated at checkout
Exact total calculated at checkout
  • Full kit with ducktail spoiler
  • Kit without spoiler
Widebody Ford Mustang with custom body kit and aggressive front bumper on white background Widebody Ford Mustang with custom body kit and aggressive front bumper on white background
2018-2023 Mustang Widebody Kit | S550 GT | SHIROKAI
$4,900.00
Full kit with ducktail spoiler

The SHIROKAI Ford Mustang S550 Widebody Kit gives your 2018–2023 Mustang a bold, aggressive stance that turns heads everywhere — width and wildness for your horse, with that unmistakable Kaiju feeling, while still following the factory bodylines. Premium automotive ABS for GT and EcoBoost builds.

What’s in the Ford Mustang S550 Widebody Kit

  • Front fender flares
  • Rear fender flares
  • Side skirts
  • Bumper fender endings
  • Front lip spoiler
  • Rear trunk spoiler

Width & Specs

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.

  • High-grade automotive ABS plastic
  • Black in mass — wrappable straight out of the box (light sanding + primer recommended for best paint result)
  • Easy plug-and-play fit, no major bodywork needed

Ford Mustang S550 Widebody Kit Fitment Guide (2018–2023)

Confirmed fitment for 2018, 2019, 2020, 2021, 2022 and 2023 Ford Mustang:

Year Model Fitment Notes
2018–2023 Mustang GT ✅ Plug & Play Direct fit, no modifications needed
2018–2023 Mustang EcoBoost ✅ Plug & Play Direct fit, no modifications needed
2018–2023 Mustang Convertible ⚠️ Partial fit Kit fits, ducktail spoiler excluded (different trunk lid)
2018–2020 Shelby GT350 & non-GT bumpers 🔧 With modifications Minor front bumper modifications required
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.

Why S550 Owners Love It

All you need is steady hands, a heat gun, and some cut-and-sand instrumentals. 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.

Wheels & Tires

Dial in your exact setup with our Widebody Wheel Fitment Calculator.

Finishing

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.

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    Overall the @shirokai.com_ kit has been one of the best fitting kits I've worked with.
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    Johnathan Rimbo 05.13.2026
  • 5
    Shirokai has the best and most aggressive body kits for any car. I love how it made my car extra thicc!
    IG @thicc_n_slow
    Daniel D. 05.14.2022
  • 5
    You guys are amazing people and I am honored to have your products on my car. I wish you guys all the success in the world. Side note so when will you open up your Las Vegas shop I’ll be the first to come by.
    IG @nemesis_3.7
    Carlo R. 09.20.2022
  • 5
    Just joined the family a short time ago but from start to finish.. ordering the kit, customer service, to delivery 3 weeks early! Everything was flawless and the quality of is unmatched! Keep killin it!
    IG @06vtgt
    Ralph P. 02.07.2023

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