Audi A4 S4 S5 Q5 SQ5 3.0 TFSI Downpipe W8-B9

High‑Flow Catless Downpipe with Heat Shield for Audi A4/S4, A5/S5 & Q5/SQ5 (8W/B9 & FY, 2015–)

Transform your 3.0 TFSI engine into a performance beast: our fully 304 stainless steel High‑Flow catless downpipe with integrated heat shield maximizes exhaust flow, reduces backpressure, and delivers a tangible 20–25 HP gain. Perfectly engineered for Audi A4/S4 (8W/B9 from 2015), A5/S5 (8W/F5 from 2016) and Q5/SQ5 (FY from 2016).

Key Benefits

• +20–25 HP Power Gain via dramatically reduced backpressure
• Optimized Flow with 182 mm main pipe diameter & 2×70 mm outlets
• Integrated Heat Shield minimizes under‑hood heat soak
• Aggressive V6 Tone without idle droning
• Precise Fit & Durability – CNC‑laser flanges & V‑band, 100% SS304 construction

Technical Specifications

• Material: 304 stainless steel, polished
• Pipe Diameter: 182 mm main section
• Outlets: 2×70 mm for seamless mid‑pipe connection
• Catless: No metal cat for maximum flow
• Heat Shield: Integrated thermal protection wrap
• Sensor Ports: Factory‑style O₂ sensor locations
• Manufacturing: Laser‑cut flanges & precision V‑band joint
• Design: 3D scan‑based CAD for exact OEM fitment
• Sound: Deep‑rich, sporty‑aggressive V6 growl

Compatible Models

• Audi A4 / S4 (8W/B9) – Model years from 2015
• Audi A5 / S5 (8W/F5) – Model years from 2016
• Audi Q5 / SQ5 (FY) – Model years from 2016

Note: Motorsport use only – not street legal, no TÜV approval. ECU retuning highly recommended.