Milltek Non-Resonated Cat-Back Exhaust - Audi B9 S5 Coupe - Burnt Titanium Tips - SSXAU688

The Milltek Non-Resonated Cat-Back Exhaust System is engineered for the Audi B9 S5 3.0 V6 Turbo Coupe and Cabriolet (Non-Sport Diff models only). This direct factory fitment system replaces the OEM cat-back section, delivering enhanced exhaust flow and aggressive sound character without modification.

Constructed from T304L stainless steel and hand-finished, the system features a 2.50" (63.50mm) mandrel-bent pipe diameter for optimized scavenging. The non-resonated design eliminates the factory resonance chamber, producing a more pronounced full-throttle note while maintaining street-legal operation. Quad GT-100 Burnt Titanium trims provide premium aesthetics and heat resistance. Uses OEM hangers and mounting points for seamless installation.

Fitment & Compatibility

• Direct fit: Audi B9 S5 3.0 TFSI V6 Turbo Coupe (2016-2023)
• Direct fit: Audi B9 S5 3.0 TFSI V6 Turbo Cabriolet (2016-2023)
• Non-Sport Differential models only - verify before purchase
• No OEM hangers or brackets require modification
• Cat-back only - factory downpipe and secondary catalytic converters remain in place

Hand-finished T304L construction, dyno-proven sound character, and OEM+ fitment define the Milltek standard.

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 > S5 > 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) > 2017 to 2023

• 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.