Milltek 80mm Non-Resonated OPF-Back Exhaust - Audi D5 S8 - Polished Tips - SSXAU948

Milltek 80mm Cat Back Non-Resonated OPF-Back Exhaust System for Audi D5 S8 4.0 TFSI V8 (2020+). Direct factory fitment replacement with T304L stainless steel construction, 80mm mandrel-bent piping, and GT-115 polished trims. Non-resonated design engineered for track-focused tone on closed-course applications.

Hand-finished T304L stainless steel (thicker gauge than T304L) resists thermal stress and corrosion. 80mm bore diameter optimizes exhaust velocity without sacrificing scavenging. Non-resonated architecture eliminates OE resonance chambers, delivering full-throttle character with pronounced mid-range and top-end note. Direct OEM hanger compatibility ensures installation without modification.

Fitment

• Audi S8 D5 4.0 TFSI V8 Saloon (2020+)
• Audi S8 D5 4.0 TFSI V8 Saloon Standard Wheelbase (2020+)
• OPF-back configuration (GPF-compatible)
• Uses OEM hangers and mounting points

Every system is hand-finished and dyno-validated to deliver measurable performance gains alongside engineered sound character.

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.