Milltek Non-Resonated Cat-Back Exhaust - Audi B9 S4 S5 - Brushed Titanium Tips - SSXAU657

The Milltek Non-Resonated Cat-Back Exhaust System is engineered for the Audi B9 S4 and S5 (non-sport differential models). This 2.50" mandrel-bent system replaces the factory exhaust, delivering enhanced flow, measurable power gains, and a signature aggressive tone without resonance chambers.

Constructed from T304L stainless steel and hand-finished with quad GT-90 titanium trims. Direct factory fitment using OEM hangers-no modification required. The non-resonated design eliminates mid-range drone while preserving full-throttle character and presence.

Fitment

• Audi S4 3.0 TFSI V6 B9 Saloon/Sedan (non-sport diff) 2016+
• Audi S4 B9 Avant (non-sport diff) 2016+
• Audi S5 3.0 TFSI V6 B9 Sportback (non-sport diff) 2017+

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 > 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.