✦ Guaranteed fitment or your money back · 90,000+ parts · 30-day returns ✦
The Boost Garage
Milltek Non-Resonated Cat-Back Exhaust | Audi B9 S4 S5 - Polished Tips

Cat-Back Exhaust

Milltek Non-Resonated Cat-Back Exhaust | Audi B9 S4 S5 - Polished Tips

Brand: Milltek

Part #: SSXAU659

$3,742.86+3742 pts
In Stock

SKU: MK-SSXAU659

Ships direct from the warehouse Guaranteed fitment 30-day returns

Description

Milltek 2.50" Non-Resonated Cat-Back Exhaust System for Audi B9 S4 and S5 (non-sport differential models). Direct factory fitment replacement using OEM hangers and mounting points-no modification required. Hand-finished T304L stainless steel construction with mandrel-bent piping engineered to eliminate factory resonance chambers. Quad polished oval trim finishes. 2.50" (63.5mm) bore diameter optimized for improved exhaust scavenging and full-throttle character without secondary silencers. Fitment • Audi S4 B9 3.0L TFSI (EA839) Saloon/Avant, non-sport differential models, 2016 and later • Audi S5 B9 3.0L TFSI (EA839) Sportback, non-sport differential models, 2017 and later Cat-back fitment: replaces factory cat-back section only. Factory turbocharger and downpipe remain in use. Requires 3-point hanger installation at factory points. T304L hand-finished construction resists corrosion under continuous track use and daily driving alike-a material and process standard competitors reserve for premium tier systems. Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Check Vehicle Fitment

Fits 22 vehicles including:

  • 2016 Audi S4— 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
  • 2018 Audi S4— 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
  • 2019 Audi S4— 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
  • 2020 Audi S4— 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
  • 2021 Audi S4— 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
  • 2022 Audi S4— 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
  • + 16 more vehicles

More Cat-Back Exhaust