{"product_id":"2015-2017-mustang-widebody-kit-s550-gt-shirokai","title":"Mustang Widebody Kit | 2015-2017 GT S550 | SHIROKAI","description":"\u003cp\u003eThe \u003cstrong\u003eSHIROKAI 2015–2017 Mustang S550 Widebody Kit\u003c\/strong\u003e is engineered for the pre-facelift Ford Mustang S550 platform, giving GT and EcoBoost builds real width, stronger presence, 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 overfenders 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 signature Kaiju stance without turning the car into a random bolt-on mess.\u003c\/p\u003e\n\n\u003ch2\u003eFord Mustang S550 (2015-2017) Widebody Kit — Quick Facts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 2015–2017 Mustang GT and EcoBoost (plug-and-play), Convertible kit-only (spoiler excluded), 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 2015–2017 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) — best-selling Mustang widebody kit in our catalog\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus:\u003c\/strong\u003e SHIROKAI's most popular Mustang platform, with strong owner community across US, EU, and Asia\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\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 — room for an aggressive wheel and tire setup.\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\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFord Mustang S550 Widebody Kit Fitment Guide (2015–2017)\u003c\/h2\u003e\n\u003cp\u003eConfirmed fitment for \u003cstrong\u003e2015, 2016 and 2017 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\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\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2015–2017\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\u003e2015–2017\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\u003e2015–2017\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\u003e2015–2017\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\u003e2018–2023\u003c\/td\u003e\n\u003ctd\u003eMustang S550 facelift\u003c\/td\u003e\n\u003ctd\u003e❌ Different kit\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/en-ch\/products\/shirokai-ford-mustang-s550-gt-18-widebody-kit\"\u003eSee the S550 2018–2023 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-ch\/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\n\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\u003e2015–2017 Mustang GT\/EcoBoost (plug-and-play), Convertible (kit-only), Shelby GT350 (with mods)\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\u003eCatalog status\u003c\/td\u003e\n\u003ctd\u003eBest-selling Mustang widebody kit\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\u003ch2\u003e2015–2017 Mustang S550 Widebody Kit by SHIROKAI\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 asking for the next generation, we built this kit for S550 owners — and it became an absolute best seller. If there’s a Mustang with a SHIROKAI kit at a show, it gets attention and love. The wide fender flares let you run larger, aggressive wheels, and every panel follows the Mustang’s bodylines for an accurate, easier install. Build it for street or show — this \u003cstrong\u003ewide body S550\u003c\/strong\u003e setup gives your car a powerful, planted stance.\u003c\/p\u003e\n\n\u003ch2\u003eWheels \u0026amp; Tires\u003c\/h2\u003e\n\u003cp\u003eDial in your exact setup with our \u003ca href=\"\/en-ch\/pages\/wheel-fitment-calculator\"\u003eWidebody Wheel Fitment Calculator\u003c\/a\u003e.\u003c\/p\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 (works with both pre-facelift and facelift cars). \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\u003eFinishing\u003c\/h2\u003e\n\u003cp\u003eThe finish is ready for your next step and can be wrapped from the box (light sanding + primer recommended for paint). Add your own wheels or combine with other SHIROKAI styling parts for a full transformation.\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 2015–2017 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 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.\u003c\/p\u003e\n\n\u003ch3\u003eIs this kit different from the 2018–2023 S550 kit?\u003c\/h3\u003e\n\u003cp\u003eYes. The 2018–2023 facelift Mustang has a redesigned front fascia, hood, and headlights — so it uses a separate kit. The 2015–2017 kit you're looking at is engineered specifically for the pre-facelift S550 body. If you have a 2018–2023, \u003ca href=\"https:\/\/shirok.ai\/products\/shirokai-ford-mustang-s550-gt-18-widebody-kit\"\u003esee our S550 2018–2023 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\u003eThe 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.\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":46125312442602,"sku":"S550.1517.WBF","price":4900.0,"currency_code":"USD","in_stock":true},{"title":"Kit without spoiler","offer_id":46125312475370,"sku":"S550.1517.WBNS","price":4600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0477\/0427\/7142\/files\/s550.jpg?v=1783048835","url":"https:\/\/www.k2-industries.com\/en-ch\/products\/2015-2017-mustang-widebody-kit-s550-gt-shirokai","provider":"K2 Industries","version":"1.0","type":"link"}