Milltek 80mm Non-Resonated OPF-Back Exhaust - Audi D5 S8 - Brushed Titanium Tips - SSXAU950

Milltek 80mm Cat Back Non-Resonated OPF-Back Exhaust System for Audi D5 S8 4.0 TFSI V8 (2020+). This is a direct factory-fitment cat-back replacement engineered to eliminate factory resonance chambers, delivering a more aggressive exhaust character while maintaining OEM fitment with factory hangers and mounting points.

Constructed from T304L stainless steel with CNC-formed GT-115 titanium trim ring. The 3.15" (80mm) mandrel-bent pipe improves exhaust scavenging and gas velocity compared to factory restrictive passages. Hand-finished construction ensures durability and corrosion resistance. OPF-back fitment means the system begins after the gasoline particulate filter, making it street-legal while delivering full sonic character and measurable flow gains on dyno testing.

Fitment

• Audi S8 D5 (2020+) 4.0 TFSI V8 Saloon - all wheelbase variants
• Direct OEM mount compatibility; no modification required
• OPF-back configuration (post-particulate filter)

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

Specifications

• Pipe diameter: 80mm (3.15")
• Fitting time: 2.5 to 3.5 hours, including removing the factory system

Fitment

• Audi > S8 > D5 4.0 TFSI V8 Saloon/Sedan - Standard Wheel Base (GPF US/ROW Models) > 2020 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.