Milltek HJS Hi-Flow Sports Cat and Downpipe | Audi S4 B9

Description

Milltek HJS Hi-Flow Sports Cat and Downpipe for the Audi S4 B9 Engineered as a direct replacement for the factory downpipe, mandrel-bent throughout to maintain flow and fitted to the OE mounting points. Key Features • Premium Materials: T304Lstainless steel for durability and lasting corrosion resistance. • Enhanced Performance: 2.50" (63.50mm) mandrel-bent pipework improves exhaust flow for sharper throttle response. • Direct Fitment: engineered as a bolt-on replacement for the factory system. • Race Use: intended for track and off-road use— check local regulations before road use.Technical Specifications • Pipe Diameter: 2.50" (63.50mm) • Material: T304L Stainless Steel • System Type: HJS Hi-Flow Sports Cat and Downpipe • Fitting Time: 1.00 to 1.50 hoursCompatibility • 2017 and later S5 3.0 V6 Turbo Sportback B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only • 2017 and later S5 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only • 2017 and later S5 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only • 2017 and later S5 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only • 2017 and later S5 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & WITH Brace Bars) - Left Hand Drive Cars Only • 2017 and later S5 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & WITH Brace Bars) - Left Hand Drive Cars Only • 2016 and later S4 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only • 2016 and later S4 3.0 Turbo V6 B9 - Saloon/Sedan & Avant (ONLY - Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars OnlyWhy Choose Milltek? Every system is precision-built to deliver the sound, flow, and quality that define the Milltek difference. Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Fits 22 vehicles including:

• 2017 Audi S5— 3.0 V6 Turbo Sportback B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport D
• 2018 Audi S5— 3.0 V6 Turbo Sportback B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport D
• 2019 Audi S5— 3.0 V6 Turbo Sportback B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport D
• 2020 Audi S5— 3.0 V6 Turbo Sportback B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport D
• 2021 Audi S5— 3.0 V6 Turbo Sportback B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport D
• 2022 Audi S5— 3.0 V6 Turbo Sportback B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe/Cabrio B9 (Non Sport Diff Models Only) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Coupe Only B9 (Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only > 2017 and Later / 3.0 V6 Turbo Sportback B9 (Sport D
• + 16 more vehicles