Milltek Non-Resonated Cat-Back Exhaust - Audi B7 S4 - Polished Tips - SSXAU048

Milltek Non-Resonated Cat-Back Exhaust System for Audi B7 S4 4.2 V8 Quattro. Direct factory fitment cat-back system, 2.25" mandrel-bent T304L stainless steel construction with polished tips. Uses OEM hangers and brackets-no modification required.

Hand-finished T304L stainless steel pipe with engineered tone tuning. Non-resonated design eliminates OE silencing chambers for full-throttle sound character. Decibel-tested for aggressive exhaust note while maintaining street-legal operation. Direct replacement for factory system.

Fitment

• Audi S4 B7 (2005-2008) with 4.2 V8 Quattro engine
• Cat-back only-retains factory downpipe and catalytic converter
• Direct OEM+ fitment using factory attachment points

Construction

2.25" (57.15mm) mandrel-bent T304L stainless steel. Hand-finished welding and polished trim rings.

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.