{"product_id":"decated-stainless-downpipes-for-mercedes-benz-gt-s-m178-c190-amg-with-4-0l-engine","title":"Decated Stainless Downpipes For Mercedes Benz GT\/S M178 C190 AMG with 4.0L Engine","description":"\u003ch2\u003eMaximum Flow and Thermal Efficiency for the M178 Powerplant\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWho It’s For:\u003c\/strong\u003e Engineered for Mercedes-Benz AMG GT-series owners running the M178 biturbo powerplant who are tired of the heat soak and muted exhaust note inherent to the factory setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Symptom:\u003c\/strong\u003e The M178 engine features a \"Hot-V\" turbocharger configuration, where the turbos sit nestled between the cylinder banks. The factory downpipes use dense, restrictive catalytic converters that trap immense amounts of heat directly in the engine valley. This restriction creates high backpressure, which slows down turbo spool and forces the turbos to work harder to push exhaust gas through a bottleneck, resulting in sluggish low-end response and a sanitized V8 sound.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Engineering Fix:\u003c\/strong\u003e This decatted system replaces those restrictive factory units with high-flow, 304-grade stainless steel downpipes. By removing the primary restriction and utilizing mandrel-bent tubing, we significantly reduce the pressure differential across the turbine wheel. This allows the turbos to reach target boost much earlier in the RPM range while simultaneously venting heat away from the engine valley, protecting your cooling system and increasing overall air density for better combustion.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy Mechanics Choose This Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Turbo Dynamics:\u003c\/strong\u003e By reducing backpressure, these pipes allow for a faster pressure drop across the turbine, resulting in near-instantaneous boost recovery after shifts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnrestricted V8 Acoustics:\u003c\/strong\u003e Removes the sound-dampening ceramic substrate to reveal the raw, aggressive growl that the 4.0L biturbo engine was designed to produce.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Metallurgy:\u003c\/strong\u003e 100% TIG welded construction with laser-cut flanges ensures a warp-free fitment that survives the extreme thermal cycles of a high-output AMG engine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width='\"100%\"'\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003e2015-2020+ Mercedes-Benz AMG GT \/ S \/ C \/ R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Platform\u003c\/td\u003e\n\u003ctd\u003eM178 4.0L Bi-Turbo V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFactory Ratings\u003c\/td\u003e\n\u003ctd\u003e456 HP - 577 HP \/ 443 LB-FT - 516 LB-FT (Trim Dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Numbers\u003c\/td\u003e\n\u003ctd\u003eM178-DP-C190, C190 AMG GT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eCompatibility \u0026amp; OEM Reference\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFits the Following Vehicles:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2015+ Mercedes-Benz AMG GT (C190)\u003c\/li\u003e\n\u003cli\u003e2015-2017 Mercedes-Benz AMG GT (Pre-FaceLift)\u003c\/li\u003e\n\u003cli\u003e2016-2017 Mercedes-Benz AMG GT S (Pre-FaceLift)\u003c\/li\u003e\n\u003cli\u003e2018+ Mercedes-Benz AMG GT S (FaceLift)\u003c\/li\u003e\n\u003cli\u003e2018+ Mercedes-Benz AMG GT C (FaceLift)\u003c\/li\u003e\n\u003cli\u003e2018+ Mercedes-Benz AMG GT R (FaceLift)\u003c\/li\u003e\n\u003cli\u003e2016-2020 Mercedes-Benz C190 AMG GT\u003c\/li\u003e\n\u003cli\u003e2016-2020 Mercedes-Benz C190 AMG GT S\u003c\/li\u003e\n\u003cli\u003e2017-2020 Mercedes-Benz C190 AMG GT C\u003c\/li\u003e\n\u003cli\u003e2017-2020 Mercedes-Benz C190 AMG GT R\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInterchange Part Numbers:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eM178, C190, AMG GT, AMG GT S, AMG GT C, AMG GT R, 304SS-M178-CATLESS\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eThe Performance Promise\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBuy with confidence.\u003c\/strong\u003e Every set of downpipes is inspected for weld integrity and flange flatness. As performance specialists, we understand that these parts are intended for off-road and competition use, where flow and reliability are non-negotiable. Backed by real automotive experts and fast shipping.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":47758443970808,"sku":"DS-DOWNPIPES-GTSMC","price":895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/amggtpipe.webp?v=1771719148","url":"https:\/\/performancechiptuning.com\/products\/decated-stainless-downpipes-for-mercedes-benz-gt-s-m178-c190-amg-with-4-0l-engine","provider":"Performance Chip Tuning","version":"1.0","type":"link"}