{"product_id":"modalworks-m177-m178-3d-printed-equal-length-exhaust-manifold","title":"ModalWorks M177 \/ M178 3D-Printed Equal-Length Exhaust Manifold","description":"\u003ch2\u003eModalWorks M177 \/ M178 Equal-Length Exhaust Manifold\u003c\/h2\u003e\u003cp\u003eUpgrade the factory hot-vee exhaust manifold system with a purpose-built, equal-length design engineered for Mercedes-AMG M177 and M178 4.0-liter biturbo applications. The matched runner geometry is designed to deliver evenly spaced exhaust pulses to the turbines, support improved response, and reduce the compromises of the factory cast layout.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManufacturer-reported testing:\u003c\/strong\u003e up to 66 hp more in the midrange, up to 60 lb-ft of additional peak torque, and full boost approximately 400-800 RPM sooner in back-to-back testing on the same vehicle and calibration. Actual results vary based on the vehicle, turbo system, tuning, fuel, supporting modifications, and test conditions.\u003c\/p\u003e\u003ch3\u003eConstruction and Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePatent-pending equal-length runner layout for consistent pulse timing and backpressure\u003c\/li\u003e\n\u003cli\u003eCFD-developed and 3D-printed as a single piece in heat-treated 316L stainless steel\u003c\/li\u003e\n\u003cli\u003eCNC-machined flange and sealing surfaces\u003c\/li\u003e\n\u003cli\u003e46 mm turbo entry compared with the 42 mm factory outlet\u003c\/li\u003e\n\u003cli\u003eApproximately 20% more runner cross-sectional area than stock\u003c\/li\u003e\n\u003cli\u003eDirect-fit mounting locations and factory-style turbo interface\u003c\/li\u003e\n\u003cli\u003eOptional Cerakote thermal-barrier coating\u003c\/li\u003e\n\u003cli\u003eDesigned to improve turbo response, power delivery, and exhaust character\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2015-2021 Mercedes-AMG C63 and C63 S Sedan (W205)\u003c\/li\u003e\n\u003cli\u003e2015-2021 Mercedes-AMG C63 and C63 S Coupe (C205)\u003c\/li\u003e\n\u003cli\u003e2015-2021 Mercedes-AMG GT and GT S (C190 \/ R190)\u003c\/li\u003e\n\u003cli\u003e2017-2021 Mercedes-AMG GT C and GT R (C190 \/ R190)\u003c\/li\u003e\n\u003cli\u003e2017-2021 Mercedes-AMG GLC63 and GLC63 S SUV (X253)\u003c\/li\u003e\n\u003cli\u003e2017-2021 Mercedes-AMG GLC63 and GLC63 S Coupe (C253)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eLead Time and Installation\u003c\/h3\u003e\u003cp\u003eEach set is printed and machined to order. Estimated production time is approximately four weeks. Selecting Cerakote adds approximately one to two additional weeks. Lead times are estimates and can vary.\u003c\/p\u003e\u003cp\u003eProfessional installation is required. The OEM decorative heat shield requires minor trimming for runner clearance. Cerakote-coated units use the thermal-barrier coating in place of the shield's original insulating function. Please confirm vehicle fitment and build compatibility before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eU.S. pricing:\u003c\/strong\u003e Each variant price includes a $60 standard shipping allowance and $80 shipping protection. Alaska, Hawaii, U.S. territories, expedited service, and international destinations may require additional shipping charges. Contact Zefer Performance before ordering for those destinations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This is a made-to-order performance component and is subject to Zefer Performance's posted terms and policies. This product may not be legal for use on emissions-controlled vehicles in all jurisdictions. The buyer is responsible for determining and maintaining legal compliance.\u003c\/p\u003e","brand":"ModalWorks","offers":[{"title":"No","offer_id":48855324492030,"sku":"MW-C63-EXH-MANI-V1-RAW","price":3739.0,"currency_code":"USD","in_stock":true},{"title":"Yes","offer_id":48855324524798,"sku":"MW-C63-EXH-MANI-V1-CEK","price":3989.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/4225\/7564\/files\/mw-m177-equal-length-manifold-pair_1024x1024_2x_67b5d683-c9ba-4c60-860e-c25a7e3a9d9d.jpg?v=1788394769","url":"https:\/\/zeferperformance.com\/products\/modalworks-m177-m178-3d-printed-equal-length-exhaust-manifold","provider":"Zefer Performance","version":"1.0","type":"link"}