{"product_id":"2018-2023-mustang-widebody-kit-s550-gt-shirokai","title":"Mustang Widebody Kit | 2018-2023 GT S550 | SHIROKAI","description":"\u003cp\u003eThe \u003cstrong\u003eSHIROKAI 2018–2023 Mustang S550 Widebody Kit\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003cp\u003eThis 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 without turning the car into a random bolt-on mess.\u003c\/p\u003e\n\n\u003ch2\u003eFord Mustang S550 (2018-2023) Widebody Kit — Quick Facts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 2018–2023 Mustang GT and EcoBoost (plug-and-play), Convertible kit-only (spoiler excluded), 2018–2020 Shelby GT350 with minor bumper mods\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Automotive-grade ABS plastic, 3D-scanned and CNC-cut from OEM body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth added:\u003c\/strong\u003e +3.54 in (9 cm) per side front, +4.33 in (11 cm) per side rear — 220 mm total added width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall:\u003c\/strong\u003e 12–16 hours at a body shop, plug-and-play for 2018–2023 GT\/EcoBoost with stock bumper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Front flares, rear flares, side skirts, bumper endings, front lip spoiler, rear ducktail spoiler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrice:\u003c\/strong\u003e $4,500 USD (full kit with spoiler) — designed for the redesigned 2018+ S550 front fascia\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for:\u003c\/strong\u003e Post-facelift S550 with redesigned hood, headlights, and front bumper geometry\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping:\u003c\/strong\u003e Worldwide via UPS, ~$600 to USA, ~€400 to Europe, tracked\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat’s in the Ford Mustang S550 Widebody Kit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFront fender flares\u003c\/li\u003e\n\u003cli\u003eRear fender flares\u003c\/li\u003e\n\u003cli\u003eSide skirts\u003c\/li\u003e\n\u003cli\u003eBumper fender endings\u003c\/li\u003e\n\u003cli\u003eFront lip spoiler\u003c\/li\u003e\n\u003cli\u003eRear trunk spoiler\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWidth \u0026amp; Specs\u003c\/h2\u003e\n\u003cp\u003eFront fenders add \u003cstrong\u003e3.54 in (9 cm) per side\u003c\/strong\u003e, rear fenders add \u003cstrong\u003e4.33 in (11 cm) per side\u003c\/strong\u003e, measured from the stock arch — run wider wheels and tires for more grip on road and track.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-grade automotive ABS plastic\u003c\/li\u003e\n\u003cli\u003eBlack in mass — wrappable straight out of the box (light sanding + primer recommended for best paint result)\u003c\/li\u003e\n\u003cli\u003eEasy plug-and-play fit, no major bodywork needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFord Mustang S550 Widebody Kit Fitment Guide (2018–2023)\u003c\/h2\u003e\n\u003cp\u003eConfirmed fitment for \u003cstrong\u003e2018, 2019, 2020, 2021, 2022 and 2023 Ford Mustang\u003c\/strong\u003e:\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018–2023\u003c\/td\u003e\n\u003ctd\u003eMustang GT\u003c\/td\u003e\n\u003ctd\u003e✅ Plug \u0026amp; Play\u003c\/td\u003e\n\u003ctd\u003eDirect fit, no modifications needed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018–2023\u003c\/td\u003e\n\u003ctd\u003eMustang EcoBoost\u003c\/td\u003e\n\u003ctd\u003e✅ Plug \u0026amp; Play\u003c\/td\u003e\n\u003ctd\u003eDirect fit, no modifications needed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018–2023\u003c\/td\u003e\n\u003ctd\u003eMustang Convertible\u003c\/td\u003e\n\u003ctd\u003e⚠️ Partial fit\u003c\/td\u003e\n\u003ctd\u003eKit fits, ducktail spoiler excluded (different trunk lid)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018–2020\u003c\/td\u003e\n\u003ctd\u003eShelby GT350 \u0026amp; non-GT bumpers\u003c\/td\u003e\n\u003ctd\u003e🔧 With modifications\u003c\/td\u003e\n\u003ctd\u003eMinor front bumper modifications required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015–2017\u003c\/td\u003e\n\u003ctd\u003eMustang S550 pre-facelift\u003c\/td\u003e\n\u003ctd\u003e❌ Different kit\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/en-fi\/products\/shirokai-mustang-s550-widebody-kit\"\u003eSee the S550 2015–2017 kit →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2005–2014\u003c\/td\u003e\n\u003ctd\u003eMustang S197\u003c\/td\u003e\n\u003ctd\u003e❌ Different kit\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/en-fi\/products\/shirokai-mustang-s197-widebody\"\u003eSee the S197 widebody kit →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eNot sure about your trim? Email \u003ca href=\"mailto:i@shirok.ai\"\u003ei@shirok.ai\u003c\/a\u003e — we confirm fitment within 24h.\u003c\/p\u003e\n\u003ch2\u003eWhy S550 Owners Love It\u003c\/h2\u003e\n\u003cp\u003eAll 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 \u003cstrong\u003ewide body S550\u003c\/strong\u003e 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 \u003cstrong\u003emustang widebody\u003c\/strong\u003e, a mustang wide body build, or an S550 body kit, this keeps clean bodylines with a bold, planted look.\u003c\/p\u003e\n\u003ch2\u003eWheels \u0026amp; Tires\u003c\/h2\u003e\n\u003cp\u003eDial in your exact setup with our \u003ca href=\"\/en-fi\/pages\/wheel-fitment-calculator\"\u003eWidebody Wheel Fitment Calculator\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFinishing\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWant to test our quality first?\u003c\/strong\u003e 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. \u003ca href=\"https:\/\/shirok.ai\/products\/shirokai-ford-mustang-s550-ducktail-spoiler-s550-2015-2022\"\u003eSee the S550 Ducktail Spoiler →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAutomotive-grade ABS plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturing\u003c\/td\u003e\n\u003ctd\u003eCNC-cut from OEM 3D scan data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront flare width\u003c\/td\u003e\n\u003ctd\u003e+3.54 in \/ +9 cm per side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear flare width\u003c\/td\u003e\n\u003ctd\u003e+4.33 in \/ +11 cm per side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal added width\u003c\/td\u003e\n\u003ctd\u003e220 mm across both axles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponents\u003c\/td\u003e\n\u003ctd\u003e6-piece kit: front flares (2), rear flares (2), side skirts (2), bumper endings, front lip spoiler, ducktail spoiler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eBolt-on with included hardware, drilling and rivnuts required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstall time\u003c\/td\u003e\n\u003ctd\u003e12–16 hours at a body shop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePaint prep\u003c\/td\u003e\n\u003ctd\u003eLight sanding + primer recommended for best finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWrap compatibility\u003c\/td\u003e\n\u003ctd\u003eYes, surface ready out of the box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible vehicles\u003c\/td\u003e\n\u003ctd\u003e2018–2023 Mustang GT\/EcoBoost (plug-and-play), Convertible (kit-only), 2018–2020 GT350 (with mods)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody generation\u003c\/td\u003e\n\u003ctd\u003eS550 facelift (post-2018 redesigned front fascia)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of manufacture\u003c\/td\u003e\n\u003ctd\u003eTurkey (Bursa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eLifetime tech support from manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eFor 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.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWill this kit work on my Mustang Convertible?\u003c\/h3\u003e\n\u003cp\u003ePartially. 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.\u003c\/p\u003e\n\n\u003ch3\u003eWhat about Shelby GT350 fitment?\u003c\/h3\u003e\n\u003cp\u003eThe GT350 (produced 2018–2020) uses a different front bumper than the standard GT. The kit fits with minor front bumper modifications — typically light trim work to mate the bumper endings cleanly with the flares. A competent body shop handles this in 1–2 extra hours during install. All other panels (flares, skirts, spoiler) 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.\u003c\/p\u003e\n\n\u003ch3\u003eIs this kit different from the 2015–2017 S550 kit?\u003c\/h3\u003e\n\u003cp\u003eYes. 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 (220 mm total added width), but the bumper endings and front lip are platform-specific. If you have a 2015–2017, \u003ca href=\"https:\/\/shirok.ai\/products\/shirokai-mustang-s550-widebody-kit\"\u003esee our S550 2015–2017 widebody kit\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the width compare to other SHIROKAI Mustang kits?\u003c\/h3\u003e\n\u003cp\u003eThis S550 kit adds 220 mm of total width (9 cm front + 11 cm rear per side). Our S197 kits add 240 mm total (9 cm front + 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.\u003c\/p\u003e\n\n\u003ch3\u003eHow long does installation take?\u003c\/h3\u003e\n\u003cp\u003eTypical body shop install runs 12 to 16 hours 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.\u003c\/p\u003e\n\n\u003ch3\u003eWill my doors still open with the flares installed?\u003c\/h3\u003e\n\u003cp\u003eYes. 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.\u003c\/p\u003e\n\n\u003ch3\u003eWhat wheel and tire setup works with this kit?\u003c\/h3\u003e\n\u003cp\u003e220 mm of total 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 \u003ca href=\"https:\/\/shirok.ai\/pages\/wheel-fitment-calculator\"\u003eWidebody Wheel Fitment Calculator\u003c\/a\u003e for precise sizing tailored to this kit.\u003c\/p\u003e","brand":"SHIROKAI - WIDEBODY KITS THAT FIT","offers":[{"title":"Full kit with ducktail spoiler","offer_id":46125312737514,"sku":"S550.1820.WBF","price":4900.0,"currency_code":"USD","in_stock":true},{"title":"Kit without spoiler","offer_id":46125312770282,"sku":"S550.1820.WBNS","price":4600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0477\/0427\/7142\/files\/s550_rest.jpg?v=1783048835","url":"https:\/\/www.k2-industries.com\/en-fi\/products\/2018-2023-mustang-widebody-kit-s550-gt-shirokai","provider":"K2 Industries","version":"1.0","type":"link"}