MilltekResonated Cat-Back ExhaustFitment: Audi B9 S5 - Cerakote Black Tips

Overview

Milltek 2.50" Resonated Quad Outlet Cat-Back Exhaust System for Audi B9 S5 3.0 V6 Turbo. Direct factory fitment for Coupe and Sportback models (Sport Diff with Brace Bars, 2017+). T304L stainless steel construction with CNC-formed Cerakote Black quad trims.

The resonated design eliminates drone at cruise while preserving full-throttle character. 2.50" mandrel-bent tube diameter (63.50mm) improves exhaust scavenging over OEM. Hand-finished welds and TIG construction throughout. Uses OEM hangers and suspension points-no modification required. Direct replacement for factory cat-back section; turbo and downpipe remain stock.

Details

Fitment Notes

• Audi S5 B9 3.0 V6 Turbo Coupe (Sport Diff models with Brace Bars, 2017+)
• Audi S5 B9 3.0 V6 Turbo Sportback (Sport Diff models with Brace Bars, 2017+)

Construction & Specifications

• Material: T304L stainless steel
• Pipe diameter: 2.50" (63.50mm), mandrel-bent
• Resonated: Yes-engineered for OE+ tone without cruise drone
• Outlet finish: Cerakote Black quad trims, hand-polished
• Installation: Direct fitment, OEM hangers, no cuts or modifications

This system reflects our commitment to OEM+ fitment, engineered tone character, and precision stainless fabrication-all manufactured to exacting standards.

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

Fitment