Milltek HJS ECE Downpipe For B9 Audi S4 3.0T (Non GPF)

Fits with OE and Milltek Sport Cat back Systems (EC Approved)

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
• Fits LHD Only

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.