Milltek Resonated Cat-Back Exhaust - Audi B9 S4 S5 - Burnt Titanium Tips - SSXAU647

The Milltek Resonated Cat-Back Exhaust System is a direct factory replacement for the Audi B9 S4 and S5, engineered to enhance exhaust flow and refine the OE+ sound character without aggressive resonance. This system uses 2.50" (63.50mm) mandrel-bent T304L stainless steel throughout, hand-finished for durability and corrosion resistance.

Installation requires no modification - the system uses OEM hangers and integrates seamlessly with factory components. The resonated design tuned to eliminate drone at cruising speeds while delivering a more pronounced full-throttle note. Quad GT-90 burnt titanium trims are included as standard.

Fitment

• Audi S4 3.0 Turbo V6 B9 Saloon/Sedan & Avant (non-sport differential models) 2016+
• Audi S5 3.0 Turbo V6 B9 Sportback (non-sport differential models) 2017+

Engineered in-house and tested to deliver measurable flow improvements and refined acoustic character.

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 - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
• Audi > S5 > 3.0 V6 Turbo Sportback B9 (ONLY - Non Sport Diff Models Only) - 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.