Milltek Non-Resonated Cat-Back Exhaust - Audi B9 S4 S5 - Cerakote Black Tips - SSXAU651

Milltek 2.50" Non-Resonated Cat-Back Exhaust System for Audi B9 S4 and S5 (non-sport differential models). Direct factory fitment replacement engineered to deliver increased exhaust flow, dyno-proven performance gains, and an aggressive engineered tone without resonance chambers.

Constructed from T304L stainless steel, mandrel-bent throughout with hand-finished construction. The non-resonated design eliminates mid-range resonance to unlock full-throttle character while maintaining OEM+ fitment. Uses factory hangers and mounting points-no modification required.

Fitment

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

Cat-back design: replaces rear silencer and tailpipes only. OEM cat and downpipe retained. For turbo-back coverage, see Milltek Turbo-Back systems.

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.