{"product_id":"milltek-large-bore-downpipe-hi-flow-sports-cat-for-ford-mustang-2-3-ecoboost-s550-fastback-ssxfd169","title":"Milltek Large Bore Downpipe Hi-Flow Sports Cat for Ford Mustang 2.3 EcoBoost (S550 Fastback)","description":"\u003cp\u003eMilltek Large Bore Downpipe with integrated Hi-Flow Sports Catalyst increases exhaust flow efficiency by enlarging the diameter beyond OEM specification, allowing increased gas volume to exit the engine. Designed specifically for use with Milltek Cat-Back exhaust systems, this downpipe combines mandrel-bent T304L stainless steel construction with a high-flow catalyst to deliver measurable performance gains and engineered tone character.\u003c\/p\u003e\n\u003cp\u003eFabricated from T304L stainless steel with CNC-formed components and hand-finished welds. Direct integration with Milltek Cat-Back systems uses OEM hangers for seamless fitment. Stage 2 ECU remap required for optimal performance and drivability. Decibel-tested to ensure compliance with street use.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLarge bore diameter for increased exhaust velocity\u003c\/li\u003e\n\u003cli\u003eHi-Flow sports catalyst for reduced backpressure\u003c\/li\u003e\n\u003cli\u003eT304L stainless steel construction, hand-finished\u003c\/li\u003e\n\u003cli\u003eCompatible with Milltek Cat-Back systems only\u003c\/li\u003e\n\u003cli\u003eStage 2 ECU remap required\u003c\/li\u003e\n\u003cli\u003eMandrel-bent piping throughout\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFits Milltek Cat-Back.\u003c\/p\u003e\n\u003cp\u003eDesigned in Tennessee and manufactured in the UK with 40+ years of performance exhaust heritage. Tested on the Tail of the Dragon.\u003c\/p\u003e\n\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\n\u003cul class=\"fitment-list\"\u003e\n\u003cli\u003e2015-2017 Ford Mustang V6\u003c\/li\u003e\n\u003cli\u003e2015-2018 Ford Mustang Base\u003c\/li\u003e\n\u003cli\u003e2015-2018 Ford Mustang EcoBoost\u003c\/li\u003e\n\u003cli\u003e2015-2018 Ford Mustang EcoBoost Premium\u003c\/li\u003e\n\u003cli\u003e2015-2018 Ford Mustang GT\u003c\/li\u003e\n\u003cli\u003e2015-2018 Ford Mustang GT Premium\u003c\/li\u003e\n\u003cli\u003e2015-2018 Ford Mustang Shelby GT350\u003c\/li\u003e\n\u003cli\u003e2015-2018 Ford Mustang Shelby GT350R\u003c\/li\u003e\n\u003cli\u003e2015 Ford Mustang GT 50 Years Limited Edition\u003c\/li\u003e\n\u003cli\u003e2024-2025 Ford Mustang Dark Horse Premium\u003c\/li\u003e\n\u003cli\u003e2024-2026 Ford Mustang Base\u003c\/li\u003e\n\u003cli\u003e2024-2026 Ford Mustang Dark Horse\u003c\/li\u003e\n\u003cli\u003e2024-2026 Ford Mustang EcoBoost\u003c\/li\u003e\n\u003cli\u003e2024-2026 Ford Mustang EcoBoost Premium\u003c\/li\u003e\n\u003cli\u003e2024-2026 Ford Mustang GT\u003c\/li\u003e\n\u003cli\u003e2024-2026 Ford Mustang GT Premium\u003c\/li\u003e\n\u003cli\u003e2025 Ford Mustang GTD\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":60150846751006,"sku":"MILSSXFD169","price":1689.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/SSXFD169_1.jpg?v=1791256511","url":"https:\/\/shop.signatureautohaus.com\/products\/milltek-large-bore-downpipe-hi-flow-sports-cat-for-ford-mustang-2-3-ecoboost-s550-fastback-ssxfd169","provider":"Signature Autohaus","version":"1.0","type":"link"}