{"product_id":"stage-3-race-turbo-upgrade-mercedes-amg-m178-4-0t-v8-amg-gt-c190-900-whp-ypg-motorsport","title":"Stage 3 Race Turbo Upgrade — Mercedes-AMG M178 4.0T V8 | AMG GT C190 | 900+ WHP | YPG Motorsport","description":"\u003ch2\u003eMercedes-AMG GT Stage 3 Race Turbo Upgrade — C190 M178 4.0L Twin-Turbo V8\u003c\/h2\u003e\n\n\u003cp\u003eThe YPG Motorsport Stage 3 Race Turbo upgrade for the Mercedes-AMG GT family (C190) replaces the factory turbocharger internals on the M178 engine with higher-flowing billet compressor wheels, upgraded Inconel turbine wheels, and uprated bearing assemblies — delivering 900+ WHP depending on supporting modifications and ECU calibration.\u003c\/p\u003e\n\n\u003cp\u003eThe M178 is the high-performance variant of Mercedes-AMG's 4.0L twin-turbo V8 — featuring a flat-plane crankshaft, dry-sump oiling, and a higher 8,000 RPM redline compared to the M177's cross-plane design. The factory turbochargers are conservatively sized, running out of airflow by 700–750 HP. The Stage 3 Race Turbo upgrade extends the turbo's breathing capacity while maintaining the factory housing dimensions, mounting points, oil and coolant line routing, and wastegate actuators. Bolt-on installation, no fabrication, no cutting, no permanent modifications.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2x Stage 3 Race Turbochargers\u003c\/strong\u003e — complete drop-in units matched to the M178 dry-sump architecture\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet compressor wheels\u003c\/strong\u003e — CNC-machined from forged 2618 aluminium, optimised blade geometry for maximum airflow. The M178's higher redline demands a compressor wheel that flows efficiently across a wider RPM band than the M177 — these are spec'd accordingly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded turbine wheels\u003c\/strong\u003e — high-temperature Inconel alloy, revised blade profile for improved exhaust gas flow at elevated boost pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeramic-coated housings\u003c\/strong\u003e — thermal barrier coating on the turbine housings to reduce underhood heat soak. The AMG GT's mid-front engine placement and enclosed engine bay make thermal management critical — especially in GCC ambient temperatures exceeding 45°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded bearings and shaft assembly\u003c\/strong\u003e — uprated for sustained high-RPM, high-boost operation. VSR high-speed balanced as complete rotating assemblies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew gaskets and hardware\u003c\/strong\u003e — everything needed for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePower Targets by Configuration\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003cth\u003eEstimated Output\u003c\/th\u003e\n\u003cth\u003eSupporting Mods Required\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStage 3 Race Turbos + ECU Tune (pump fuel)\u003c\/td\u003e\n\u003ctd\u003e850–900 WHP\u003c\/td\u003e\n\u003ctd\u003eDownpipes, tune, plugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStage 3 Race Turbos + Full Supporting Mods\u003c\/td\u003e\n\u003ctd\u003e900–1,000+ WHP\u003c\/td\u003e\n\u003ctd\u003eDownpipes, intakes, intercooler, tune, fuel upgrades\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStage 3 Race Turbos + Forged Internals + E85\u003c\/td\u003e\n\u003ctd\u003e1,000–1,200 WHP\u003c\/td\u003e\n\u003ctd\u003eFull build — forged bottom end, E85, upgraded fuel system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThe M178's flat-plane crankshaft and dry-sump oiling give it inherent advantages over the M177 at high RPM — exhaust pulse separation is cleaner, oil starvation under sustained lateral G is eliminated, and the engine breathes more efficiently above 6,500 RPM. This translates to higher peak power from the same Stage 3 turbo hardware compared to M177-equipped vehicles.\u003c\/p\u003e\n\n\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eFactory HP\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercedes-AMG GT\u003c\/td\u003e\n\u003ctd\u003eC190\u003c\/td\u003e\n\u003ctd\u003e2015–2021\u003c\/td\u003e\n\u003ctd\u003eM178 4.0T V8\u003c\/td\u003e\n\u003ctd\u003e462 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercedes-AMG GT S\u003c\/td\u003e\n\u003ctd\u003eC190\u003c\/td\u003e\n\u003ctd\u003e2015–2021\u003c\/td\u003e\n\u003ctd\u003eM178 4.0T V8\u003c\/td\u003e\n\u003ctd\u003e510 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercedes-AMG GT C\u003c\/td\u003e\n\u003ctd\u003eC190\u003c\/td\u003e\n\u003ctd\u003e2017–2021\u003c\/td\u003e\n\u003ctd\u003eM178 4.0T V8\u003c\/td\u003e\n\u003ctd\u003e550 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercedes-AMG GT R\u003c\/td\u003e\n\u003ctd\u003eC190\u003c\/td\u003e\n\u003ctd\u003e2017–2021\u003c\/td\u003e\n\u003ctd\u003eM178 4.0T V8\u003c\/td\u003e\n\u003ctd\u003e577 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercedes-AMG GT R Pro\u003c\/td\u003e\n\u003ctd\u003eC190\u003c\/td\u003e\n\u003ctd\u003e2019–2021\u003c\/td\u003e\n\u003ctd\u003eM178 4.0T V8\u003c\/td\u003e\n\u003ctd\u003e577 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercedes-AMG GT Black Series\u003c\/td\u003e\n\u003ctd\u003eC190\u003c\/td\u003e\n\u003ctd\u003e2020–2022\u003c\/td\u003e\n\u003ctd\u003eM178 4.0T V8\u003c\/td\u003e\n\u003ctd\u003e720 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eRequired Supporting Modifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatless downpipes\u003c\/strong\u003e — mandatory for full power extraction. The factory catalytic converters create excessive backpressure that limits turbine efficiency. YPG catless race downpipes for the AMG GT are available separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 3 ECU calibration\u003c\/strong\u003e — remaps boost targets, fuelling, ignition timing, torque limiters, and wastegate duty cycles specifically for this turbo hardware. The M178 ECU requires platform-specific calibration — M177 tunes do not apply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded spark plugs\u003c\/strong\u003e — colder heat range plugs to prevent pre-ignition under higher cylinder pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded intercooler\u003c\/strong\u003e — strongly recommended above 900 WHP. The AMG GT's engine bay runs hotter than sedan platforms due to the mid-front layout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-flow air filters or upgraded intakes\u003c\/strong\u003e — the compressor inlet is the next restriction after turbos and downpipes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/pages\/forged-internals\"\u003eForged internals\u003c\/a\u003e\u003c\/strong\u003e — recommended above 950 WHP for sustained use. YPG Motorsport offers complete \u003ca href=\"\/products\/m178-crate-engine\"\u003eM178 crate engine builds\u003c\/a\u003e rated to 1,500 HP\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eM178 vs M177 — Why the M178 Makes More Power\u003c\/h3\u003e\n\u003cp\u003eThe M178 is not just an M177 in a different car. The flat-plane crankshaft fires cylinders in an alternating left-right sequence that produces cleaner exhaust pulses for the turbochargers — each turbine receives evenly-spaced exhaust events rather than the uneven firing order of the M177's cross-plane crank. Combined with the dry-sump oiling system (no oil pan to interfere with airflow or ground clearance), the M178 is inherently better suited to sustained high-RPM, high-boost operation. The same Stage 3 turbo hardware produces approximately 100 WHP more on the M178 than on the M177.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eBolt-on replacement using factory mounting points. The AMG GT's hot-V layout provides good turbo access once the intake manifold and charge pipes are removed. No fabrication, cutting, or permanent modifications required. Factory oil feed\/drain lines, coolant lines, and wastegate actuators are retained.\u003c\/p\u003e\n\n\u003cp\u003eEstimated installation time: 10–14 hours at a competent independent shop familiar with the AMG GT platform.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNo core exchange required.\u003c\/strong\u003e You keep your factory turbochargers.\u003c\/p\u003e\n\n\u003ch3\u003eWarranty \u0026amp; Shipping\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1-year warranty\u003c\/strong\u003e on all turbocharger components against manufacturing defects. \u003cstrong\u003eFree worldwide shipping.\u003c\/strong\u003e GCC delivery via FedEx International Priority in 1–3 business days. International shipping typically 5–10 business days. Ships from Kuwait.\u003c\/p\u003e\n\n\u003cp\u003eContact YPG Motorsport for lead times and availability: \u003ca href=\"mailto:sales@ypgmotorsport.com\"\u003esales@ypgmotorsport.com\u003c\/a\u003e or WhatsApp us directly.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"What AMG GT models does this Stage 3 Race Turbo fit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fits all Mercedes-AMG GT C190 variants: GT, GT S, GT C, GT R, GT R Pro, and GT Black Series — all with the M178 4.0L twin-turbo V8.\"}},\n{\"@type\":\"Question\",\"name\":\"How much horsepower does the M178 Stage 3 Race Turbo make?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"850–900 WHP on pump fuel with downpipes and ECU tune. 900–1,000+ WHP with full supporting mods. Up to 1,200 WHP with forged internals and E85.\"}},\n{\"@type\":\"Question\",\"name\":\"Is the M178 Stage 3 turbo the same as the M177 kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The M178 uses a flat-plane crankshaft and dry-sump oiling with different exhaust pulse characteristics. The Stage 3 turbos are spec'd specifically for the M178's firing order and higher redline. They are not interchangeable with M177 kits.\"}},\n{\"@type\":\"Question\",\"name\":\"Why does the M178 make more power than the M177 with the same turbos?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The M178's flat-plane crankshaft produces cleaner, evenly-spaced exhaust pulses for each turbocharger. Combined with the dry-sump oiling and higher 8,000 RPM redline, the M178 breathes more efficiently at high RPM — producing approximately 100 WHP more than the M177 with equivalent turbo hardware.\"}},\n{\"@type\":\"Question\",\"name\":\"Do I need forged internals for Stage 3?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not for 900 WHP on pump fuel. Forged internals are recommended above 950 WHP for sustained use. YPG offers M178 crate engine builds rated to 1,500 HP.\"}},\n{\"@type\":\"Question\",\"name\":\"Is a core exchange required?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. You keep your factory turbochargers. The Stage 3 Race Turbos are complete drop-in replacement units.\"}},\n{\"@type\":\"Question\",\"name\":\"Is this a bolt-on installation?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Uses factory mounting points, oil and coolant lines, and wastegate actuators. No fabrication, cutting, or permanent modifications. 10–14 hour install time.\"}},\n{\"@type\":\"Question\",\"name\":\"Do you ship worldwide?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Free worldwide shipping. GCC delivery in 1–3 business days via FedEx International Priority.\"}}\n]}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[\n{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Performance Parts\",\"item\":\"https:\/\/ypgmotorsport.com\/collections\/performance-parts\"},\n{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Turbos\",\"item\":\"https:\/\/ypgmotorsport.com\/collections\/turbos\"},\n{\"@type\":\"ListItem\",\"position\":3,\"name\":\"AMG GT Stage 3 Race Turbo M178\",\"item\":\"https:\/\/ypgmotorsport.com\/products\/stage-3-race-turbo-upgrade-m178-amg-gt-c190-ypg-motorsport\"}\n]}\n\u003c\/script\u003e","brand":"YPG Motorsport","offers":[{"title":"Default","offer_id":48750863810752,"sku":"YPG-M178-STG3-RACE-TURBO","price":6999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0084\/7288\/7360\/files\/m178-stg3-race-turbo-ypg.png?v=1786240980","url":"https:\/\/ypgmotorsport.com\/products\/stage-3-race-turbo-upgrade-mercedes-amg-m178-4-0t-v8-amg-gt-c190-900-whp-ypg-motorsport","provider":"YPG Motorsport","version":"1.0","type":"link"}