{"product_id":"milltek-large-bore-downpipe-hi-flow-sports-cat-for-vw-golf-mk4-gti-ssxvw393","title":"Milltek Large Bore Downpipe Hi-Flow Sports Cat for VW Golf MK4 GTI","description":"\u003cp\u003eThe Milltek 3\" Large Bore Downpipe with integrated Hi-Flow Sports Catalyst is engineered for VAG 1.8T platforms (Audi A3, VW Golf Mk4 GTI, Seat Leon, Skoda Octavia RS, and others). This component pairs with OEM or Milltek cat-back exhaust systems to unlock flow gains across the entire exhaust path. T304L stainless steel construction with mandrel-bent piping ensures durability and precise flow dynamics.\u003c\/p\u003e\n\u003cp\u003eThe hi-flow catalyst maintains emissions compliance while minimizing backpressure — dyno-proven gains in mid-range torque and top-end power without sacrificing reliability. Direct factory fitment uses OEM hangers and mounting points; no modification required. Stage 2+ ECU software typically required to realize full potential. Decibel-tested for street and circuit use.\u003c\/p\u003e\n\u003ch3\u003eVehicle Fitment:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi A3 1.8T 2WD (2000-2005, 3 \u0026amp; 5 door)\u003c\/li\u003e\n\u003cli\u003eSeat Leon 1.8T Sport \u0026amp; Cupra 180PS (2000–2005)\u003c\/li\u003e\n\u003cli\u003eSkoda Octavia RS 1.8T 180 \u0026amp; 150 (2000-2005)\u003c\/li\u003e\n\u003cli\u003eVolkswagen Bora 1.8T 2WD (2000–2005)\u003c\/li\u003e\n\u003cli\u003eVolkswagen Golf Mk4 GTI 1.8T (2000-2005)\u003c\/li\u003e\n\u003cli\u003eVolkswagen Golf Mk4 337 Anniversary 180 bhp (2002–2004)\u003c\/li\u003e\n\u003cli\u003eVolkswagen Jetta Mk4 1.8T 2WD (1999–2005)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specs:\u003c\/strong\u003e Bore: 76.2 mm (3\"); Material: T304L stainless steel; Integration: OEM cat-back or Milltek cat-back (selection required at purchase).\u003c\/p\u003e\n\u003cp\u003e Hand-finished construction and rigorous dyno testing distinguish Milltek systems from universal-fit alternatives. \u003c\/p\u003e\n\u003cp\u003eDesigned and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.\u003c\/p\u003e\n\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\n\u003cul class=\"fitment-list\"\u003e\n\u003cli\u003e1998-2004 Volkswagen Golf GL\u003c\/li\u003e\n\u003cli\u003e1998-2004 Volkswagen Golf GTI\u003c\/li\u003e\n\u003cli\u003e1998 Volkswagen Golf GTI VR6\u003c\/li\u003e\n\u003cli\u003e1998 Volkswagen Golf K2\u003c\/li\u003e\n\u003cli\u003e1999-2003 Volkswagen Jetta GLX\u003c\/li\u003e\n\u003cli\u003e1999-2004 Volkswagen Golf GLS\u003c\/li\u003e\n\u003cli\u003e1999-2005 Volkswagen Jetta GL\u003c\/li\u003e\n\u003cli\u003e1999-2005 Volkswagen Jetta GLS\u003c\/li\u003e\n\u003cli\u003e1999-2005 Volkswagen Jetta TDI\u003c\/li\u003e\n\u003cli\u003e1999 Volkswagen Golf TDI\u003c\/li\u003e\n\u003cli\u003e1999 Volkswagen Golf Wolfsburg Edition\u003c\/li\u003e\n\u003cli\u003e1999 Volkswagen Jetta Wolfsburg Edition\u003c\/li\u003e\n\u003cli\u003e2000-2001 Volkswagen Golf GTI GLS\u003c\/li\u003e\n\u003cli\u003e2000-2001 Volkswagen Golf GTI GLX\u003c\/li\u003e\n\u003cli\u003e2001 Volkswagen Jetta Wolfsburg Edition\u003c\/li\u003e\n\u003cli\u003e2002-2004 Volkswagen Golf GTI 1.8T\u003c\/li\u003e\n\u003cli\u003e2002-2004 Volkswagen Golf GTI VR6\u003c\/li\u003e\n\u003cli\u003e2002-2005 Volkswagen Jetta GLI\u003c\/li\u003e\n\u003cli\u003e2002 Volkswagen Golf GTI 337\u003c\/li\u003e\n\u003cli\u003e2003 Volkswagen Golf GTI 20th Anniversary\u003c\/li\u003e\n\u003cli\u003e2003 Volkswagen Jetta Wolfsburg Edition\u003c\/li\u003e\n\u003cli\u003e2004 Volkswagen Golf GL TDI\u003c\/li\u003e\n\u003cli\u003e2004 Volkswagen Golf GLS TDI\u003c\/li\u003e\n\u003cli\u003e2005 Volkswagen Jetta 2.5\u003c\/li\u003e\n\u003cli\u003e2005 Volkswagen Jetta GL TDI\u003c\/li\u003e\n\u003cli\u003e2005 Volkswagen Jetta GLS TDI\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":60151450075422,"sku":"MILSSXVW393","price":1038.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/SSXVW393_1.jpg?v=1791263120","url":"https:\/\/shop.signatureautohaus.com\/products\/milltek-large-bore-downpipe-hi-flow-sports-cat-for-vw-golf-mk4-gti-ssxvw393","provider":"Signature Autohaus","version":"1.0","type":"link"}