Milltek Non-Resonated Cat-Back - Audi B9 S5 Sportback - Carbon Fibre Tips - SSXAU1117

Milltek Non-Resonated Cat-Back exhaust system for Audi B9 S5 Sportback with Sports Diff and factory brace bars. Direct bolt-on replacement using OEM hangers and mounting points-no modification required. Our loudest system in the B9 S5 lineup, engineered to deliver maximum sound character and measurable performance gains on the dyno.

Hand-finished T304L stainless steel construction with mandrel-bent piping throughout. 2.5" diameter main pipe flows to 4" GT-100 round tips, or upgrade to quad oval tips in polished stainless or Cerakote Black finish. Non-resonated design eliminates the mid-range resonance point for full-throttle presence; track-focused tuning suitable for closed-course use.

• Fitment: Audi B9 S5 Sportback (2017-present) with Sports Differential and Factory Brace Bars
• Material: T304L stainless steel, hand-finished
• Pipe diameter: 2.5" mandrel-bent
• Tip options: 4" GT-100 round or quad oval (polished or Cerakote Black)
• Installation: Direct OEM fitment, no welding or modification
• Sound character: Full-throttle note with minimal drone elimination

Engineered in-house and dyno-proven.

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

Fitment

• Audi > S5 > 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & WITH Brace Bars) - Left Hand Drive Cars Only > 2017 and Later
• Audi > S5 > 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & WITH 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.