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

SKU: SSXAU659

$3742.86 $3742.86 $3031.71 $3031.71
Milltek Non-Resonated Cat-Back Exhaust for Audi B9 S4 and S5 (2016+, non-sport diff). Hand-finished T304L stainless, 2.50" mandrel-bent, quad polished ovals, direct OEM fitment. Dyno-proven airflow gains.

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 (EA888 Gen 3H) Saloon/Avant, non-sport differential models, 2016 and later
  • Audi S5 B9 3.0L TFSI (EA888 Gen 3H) 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.

Key Facts

Pipe Diameter 63.50
  1 to 1.5 hours to fit (including removing OE system)
Race Product No
EMarked No

System Fitment List

    • Audi > S4 > 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only > 2016 and Later
    • Audi > S5 > 3.0 V6 Turbo Sportback B9 (ONLY - Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later

Shipping Information

This system ships in 2 boxes.

Box 1: 60 x 18 x 15 at 59.54lbs
Box 2: 51 x 15 x 12 at 35.28lbs