Milltek Resonated Cat-Back Exhaust - Audi B9 S4 S5 - Polished Tips - SSXAU694

Milltek 2.50" resonated cat-back exhaust system for Audi B9 S4 and S5 3.0 V6 Turbo. Direct factory fitment for sport differential models without brace bars (2016+ S4 sedan/Avant, 2017+ S5 Sportback). Quad GT-100 polished tips. T304L stainless steel construction, mandrel-bent throughout.

The resonated design delivers an engineered tone that enhances the OE+ character while maintaining composure at cruise. 2.50" (63.50mm) diameter pipe optimizes exhaust scavenging for the 3.0 turbo's airflow requirements. Hand-finished welds and CNC-formed flanges ensure OEM-quality fitment. Uses factory hangers and mounting points-no modification required.

Fitment

• Audi S4 B9 3.0 V6 Turbo - Saloon and Avant (sport differential, no brace bars) - 2016+
• Audi S5 B9 Sportback 3.0 V6 Turbo (sport differential, no brace bars) - 2017+

Resonated cat-back systems preserve rear valence fitment and maintain OE compatibility. T304L stainless steel resists thermal cycling and road salt for proven longevity.

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 - Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only > 2016 and Later
• Audi > S5 > 3.0 V6 Turbo Sportback B9 (ONLY - Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only > 2017 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.