{"product_id":"milltek-large-bore-downpipe-hi-flow-sports-cat-vw-golf-mk4-gti-ssxvw393","title":"Large Bore Downpipe Hi-Flow Sports Cat | VW Golf MK4 GTI | Milltek","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\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\u003ch2\u003eDetails\u003c\/h2\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\u003ch2\u003eFitment\u003c\/h2\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":68005540167982,"sku":"SSXVW393","price":883.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/1719\/1726\/files\/SSXVW393_1.jpg?v=1794451818","url":"https:\/\/shopicwp.com\/products\/milltek-large-bore-downpipe-hi-flow-sports-cat-vw-golf-mk4-gti-ssxvw393","provider":"Inner Circle Wheels and Performance","version":"1.0","type":"link"}