Milltek HJS ECE Downpipe - Audi S4 3.0 Turbo V6 B9 - Left Hand Drive Cars Only - SSXAU725

ECE-approved high-flow sports cat downpipe engineered for full European road legality (R103 compliant) without requiring ECU software modification or triggering diagnostic codes. 200–300 cell construction delivers measurable flow gains while maintaining OE compatibility.

Hand-finished T304L stainless steel construction. Direct fitment with OEM hangers. Compatible with both OE cat-back systems and Milltek cat-back exhausts. EC Type Approved for immediate EU registration compliance.

• ECE R103 compliant — no check engine light
• 200–300 cell high-flow design
• T304L stainless steel, mandrel-bent internals
• Works with OE or Milltek cat-back systems
• No ECU tuning required

Engineered to deliver real performance gains without compromise on emissions compliance or installation complexity. Precision-engineered for enthusiasts who demand both dyno results and road legality.

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Specifications

• Pipe diameter: 63.5mm (2.50")
• Fitting time: 1 to 1.5 hours, including removing the factory system
• E-marked for road use

Fitment

• Audi > S4 > 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
• Audi > S4 > 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only > 2016 and Later

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.