Milltek Large Bore Downpipe Hi-Flow Sports Cat | VW Golf MK4 GTI

Description

The 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. The 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. Vehicle Fitment: • Audi A3 1.8T 2WD (2000-2005, 3 & 5 door) • Seat Leon 1.8T Sport & Cupra 180PS (2000–2005) • Skoda Octavia RS 1.8T 180 & 150 (2000-2005) • Volkswagen Bora 1.8T 2WD (2000–2005) • Volkswagen Golf Mk4 GTI 1.8T (2000-2005) • Volkswagen Golf Mk4 337 Anniversary 180 bhp (2002–2004) • Volkswagen Jetta Mk4 1.8T 2WD (1999–2005) Technical Specs: Bore: 76.2 mm (3"); Material: T304L stainless steel; Integration: OEM cat-back or Milltek cat-back (selection required at purchase). Hand-finished construction and rigorous dyno testing distinguish Milltek systems from universal-fit alternatives. Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Fits 18 vehicles including:

• 2002 Volkswagen Golf— MK4 337 Anniversary > 2002 to 2004 / MK4 1.8T 2WD > 1998 to 2004
• 2003 Volkswagen Golf— MK4 337 Anniversary > 2002 to 2004 / MK4 1.8T 2WD > 1998 to 2004
• 2004 Volkswagen Golf— MK4 337 Anniversary > 2002 to 2004 / MK4 1.8T 2WD > 1998 to 2004
• 2000 Volkswagen GTI— MK4 GTI 1.8T > 1998 to 2004
• 2001 Volkswagen GTI— MK4 GTI 1.8T > 1998 to 2004
• 2002 Volkswagen GTI— MK4 GTI 1.8T > 1998 to 2004
• + 12 more vehicles