Milltek Resonated Cat-Back Exhaust - Audi B7 S4 - Polished Tips - SSXAU046

The Milltek Resonated Cat-Back Exhaust System is engineered specifically for the Audi B7 S4, delivering OEM+ fitment with a hand-finished T304L stainless steel construction. Direct factory fitment using OEM hangers-no modification required.

Constructed from premium T304L stainless steel with mandrel-bent piping and a 2.25" (57.15mm) diameter, this resonated system is tuned to eliminate drone while preserving the engine's full-throttle character. The resonance point is engineered to enhance the naturally aggressive B7 S4 soundtrack without compromising comfort on closed-throttle driving.

System Specifications

• Pipe diameter: 2.25" (57.15mm) mandrel-bent construction
• Material: T304L hand-finished stainless steel
• Design: Resonated cat-back (factory muffler delete, secondary resonator tuned for tone control)
• Fitment: Direct OEM+ replacement for B7 S4 Sedan and Cabriolet
• Tip options: Polished or gloss black stainless finishes
• Installation: Uses factory hangers and mounting points-no cutting, welding, or fabrication required

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Specifications

• Pipe diameter: 57.15mm (2.25")
• Fitting time: 1.5 to 2 hours, including removing the factory system

Fitment

• Audi > S4 > 4.2 V8 quattro B7 Saloon/Sedan, Avant, & Cabriolet > 2004 to 2009

• 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.