Milltek Resonated Cat-Back Exhaust - Audi B9 S5 Coupe - Carbon Fibre Tips - SSXAU683

The Milltek Resonated Cat-Back Exhaust System is engineered for the Audi B9 S5 3.0 TFSI V6 Turbo Coupe and Cabriolet (Non-Sport Differential models only). This system replaces the factory cat-back section, delivering improved exhaust flow and a refined, sportier tone while maintaining OEM+ fitment and compatibility.

Constructed from T304L stainless steel with mandrel-bent 2.50" (63.5mm) diameter tubing, this resonated design eliminates drone while enhancing the natural engine character across the rev range. Finished with quad JET-100 carbon fiber trim outlets. Direct factory fitment uses OEM hangers and mounting points-no modifications required. Hand-finished construction and EC Approval for street use.

Fitment & Specifications

• Vehicle: Audi B9 S5 Coupe / Cabriolet (2017-2020)
• Engine: 3.0 TFSI V6 Turbo (CZEA / CZEB)
• Pipe Diameter: 2.50" mandrel-bent T304L stainless
• Configuration: Resonated (OE+ tone, drone-free)
• Outlet Style: Quad JET-100 carbon trim
• Fitment: Direct cat-back replacement, OEM+ hangers, no modification
• Compatibility: Non-Sport Differential models only

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 > S5 > 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) > 2017 to 2023

• 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.