{"product_id":"stage-2-billet-turbo-upgrade-mercedes-amg-gt-gts-gtc-gtr-r190-m178","title":"Stage 2 Billet Turbo Upgrade for Mercedes-AMG GT \/ GT S \/ GT C \/ GT R (R190) – M178 4.0L BiTurbo","description":"\u003cdiv style=\"max-width:900px;margin:auto;font-family:Arial,sans-serif;line-height:1.7;color:#222;\"\u003e\n\u003ch1\u003eStage 2 Billet Turbo Upgrade — Mercedes-AMG GT (R190)\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eStage 2 Billet Turbo Upgrade\u003c\/strong\u003e is the \u003cstrong\u003elargest factory-housing turbo upgrade available\u003c\/strong\u003e for the \u003cstrong\u003eM178 4.0L V8 BiTurbo\u003c\/strong\u003e — engineered for serious power while keeping true bolt-on fitment in the AMG GT.\u003c\/p\u003e\n\u003cp\u003eBuilt for high-boost street cars, track builds and setups planning for more power later, the Stage 2 turbo dramatically increases airflow through custom billet internals while retaining OEM-style installation.\u003c\/p\u003e\n\u003chr style=\"margin:22px 0;\"\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMercedes-AMG \u003cstrong\u003eGT\u003c\/strong\u003e (R190) — M178 4.0L V8 BiTurbo\u003c\/li\u003e\n\u003cli\u003eMercedes-AMG \u003cstrong\u003eGT S\u003c\/strong\u003e (R190) — M178 4.0L V8 BiTurbo\u003c\/li\u003e\n\u003cli\u003eMercedes-AMG \u003cstrong\u003eGT C\u003c\/strong\u003e (R190) — M178 4.0L V8 BiTurbo\u003c\/li\u003e\n\u003cli\u003eMercedes-AMG \u003cstrong\u003eGT R\u003c\/strong\u003e (R190) — M178 4.0L V8 BiTurbo\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size:0.9em;color:#555;\"\u003eNot sure your car is covered? Send us your VIN and we will confirm before you order.\u003c\/p\u003e\n\u003chr style=\"margin:22px 0;\"\u003e\n\u003ch2\u003eWhat Makes the Stage 2 Turbo Different\u003c\/h2\u003e\n\u003cp\u003eBuilt around the largest turbo configuration that still fits inside the factory housing footprint — massive airflow capability without the complexity or fitment problems of a full custom turbo system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLargest factory-housing turbo\u003c\/strong\u003e available for the platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet compressor wheel\u003c\/strong\u003e — 55mm inducer \/ 73mm exducer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-flow turbine wheel\u003c\/strong\u003e — 55mm\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFully bolt-on installation\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eStage 2:\u003c\/strong\u003e compressor 55mm inducer \/ 73mm exducer · turbine 55mm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFactory turbo, for reference:\u003c\/strong\u003e compressor 41.7mm inducer \/ 56mm exducer · turbine 44.5mm \/ 50mm · A\/R 0.57\u003c\/p\u003e\n\u003cp\u003eThe size difference shows how much additional airflow capacity this upgrade provides over stock.\u003c\/p\u003e\n\u003chr style=\"margin:22px 0;\"\u003e\n\u003ch2\u003eWhat These Turbos Need\u003c\/h2\u003e\n\u003cp\u003eThe turbo will physically install on a stock car. It will not make its numbers on one.\u003c\/p\u003e\n\u003cdiv style=\"border-left:4px solid #990000;background:#f7f7f7;padding:16px 18px;margin:18px 0;\"\u003e\n\u003cstrong\u003e\u003ca style=\"color:#111;\" href=\"\/products\/mercedes-amg-gt-ecu-tune-m178\"\u003eCustom ECU calibration\u003c\/a\u003e — required.\u003c\/strong\u003e The factory file cannot run these turbos.\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust:\u003c\/strong\u003e \u003ca style=\"color:#111;\" href=\"\/products\/m178-catless-downpipes-mercedes-amg-gt-gts-gtr-gtc\"\u003ecatless downpipes\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e \u003ca style=\"color:#111;\" href=\"\/products\/csf-8187-auxiliary-radiators-for-mercedes-amg-gt-gts-gtc-gtr-high-performance-cooling-upgrade\"\u003eCSF 8187 auxiliary radiators\u003c\/a\u003e, \u003ca style=\"color:#111;\" href=\"\/products\/wagner-tuning-performance-intercooler-kit-for-mercedes-amg-gt-gts-gtc-gtr-m178-v8\"\u003eWagner intercooler kit\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake:\u003c\/strong\u003e \u003ca style=\"color:#111;\" href=\"\/products\/amg-gt-cold-air-intake-kit-m178-4-0l-v8-bi-turbo-gt-gtr-gts-upgrade-1\"\u003ecold air intake kit\u003c\/a\u003e, \u003ca style=\"color:#111;\" href=\"\/products\/bmc-panel-air-filter-set-amg-gt-gts-gtr-m178-high-flow\"\u003eBMC panel filters\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoost control:\u003c\/strong\u003e \u003ca style=\"color:#111;\" href=\"\/products\/gfb-dv-diverter-valve-mercedes-amg-gt-gts-gtc-gtr-m178-v8\"\u003eGFB DV+\u003c\/a\u003e, \u003ca style=\"color:#111;\" href=\"\/products\/vta-blow-off-valve-adapters-for-amg-gt-gts-gtc-gtr-r190\"\u003eVTA \/ BOV adapters\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align:center;margin:22px 0;\"\u003e\u003ca style=\"background:#111;color:#fff;padding:13px 26px;text-decoration:none;border-radius:6px;font-weight:bold;\" href=\"\/collections\/amg-gt-gts-gtr-gtc-performance-upgrades\"\u003eView the full AMG GT range\u003c\/a\u003e\u003c\/div\u003e\n\u003chr style=\"margin:22px 0;\"\u003e\n\u003ch2\u003eCore Return \u0026amp; Wastegate Instructions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCore return required\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRemove your factory wastegate actuators before shipping your cores\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eIf turbos are received with wastegates installed, \u003cstrong\u003edo not use them\u003c\/strong\u003e — reuse your original factory wastegates for known calibration and reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho This Turbo Is For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOwners targeting \u003cstrong\u003e850–1000+ HP\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTrack-focused or high-boost street builds\u003c\/li\u003e\n\u003cli\u003eFuture-proof setups planning for more power later\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color:#555;font-size:14px;\"\u003e\u003cstrong\u003eNeed help confirming fitment or supporting mods?\u003c\/strong\u003e Contact us before ordering and we will help you build the setup correctly the first time.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"benzunited parts","offers":[{"title":"Default Title","offer_id":47282998378671,"sku":null,"price":4995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/w205-c63-c63s-m177-stage-2-billet-turbo-upgrade_87b9e4f0-76ad-43df-bd14-79bd3ded7e3e.jpg?v=1785465110","url":"https:\/\/benzunitedparts.com\/products\/stage-2-billet-turbo-upgrade-mercedes-amg-gt-gts-gtc-gtr-r190-m178","provider":"BenzUnited Parts","version":"1.0","type":"link"}