Unitronic B8/B8.5 A4/A5 3-inch Turbo-Back Exhaust System




Unitronic is pleased to present its 3? Performance Turbo-Back Exhaust System for the B8/B8.5 A4/A5.Featuring TIG welded T304 Stainless Steel CNC mandrel bent construction stainless steel corrugated flex section high flow 200-cell metallic catalytic converter and a free flowing design; Unitronic's Turbo-Back Exhaust Systems are designed to remove the factory exhaust restrictions to unleash the full potential of the engine. Like all of Unitronic's Performance Exhaust Systems a unique v-band fastener system using T316 Stainless Steel flanges was utilized to ensure a leak proof connection every time. This is achieved through a locking ring on all Unitronic v-band flanges to guarantee a centric alignment of the two flanges. Unitronic's mufflers feature a high density high temperature glass fiber packing and are stamped with the Unitronic logo. These attributes combined ensure maximum performance while maintaining a comfortable and unobtrusive tone inside the cabin. Exiting at the rear exhaust gasses pass through dual 3" double walled polished tips engraved with the Unitronic logo.


  • 3-inch T304 Stainless Steel Mandrel Bent Tubing: Quality Material that will not rust and will outlast your vehicle.
  • T316 Stainless Steel Flanges: Durable rust proof and cnc machined.
  • Factory Catalyst Position: Ensure maximum efficiency of the catalytic converter in line with OEM catalytic converter warm up strategy.
  • 200-Cell Metallic Matrix High-Flow Catalyst: Highly durable Matrix allowing minimal power loss while assuring maximum efficiency and flow.
  • OEM-Inspired Catalytic Converter Heat Shield: Help to reduce radiant heat in the engine bay.
  • Direct Bolt-On Fitment: Use all factory exhaust hanger and doesn't require any modification or adjustment.
  • OEM Oxygen Sensor Placement: No need for O2 sensor extension or modification of the wiring harness.
  • 4-inch Corrugated Stainless Steel Flex Section: High quality flex with inner interlock that will stay leak proof for years. It allows engine movement without stressing the factory rubber mounts.
  • TIG Welded Construction: Professionally hand welded to ensure longevity resistance and leak proof.
  • Unique V-Band Fastening System Featuring Clampco® Clamps: Maintain a perfect alignment every time while insuring a leak proof connection every time. Fully reusable and quick install.
  • Sound Reflection Chamber Technology: Sound reflection chamber used to cancel unwanted sound frequency and ensure a deep tone.
  • Sound Absorption Technology: Perforated chamber packed with High quality and durable high temperature Fiberglass wool. Ensure a deep tone and unwanted frequency absorption.
  • Straight-Through Free Flowing Muffler Design: Optimal performance achieved by removing restriction and reducing back pressure.
  • Polished 3-inch Double Walled Exhaust Tips: Mirror polished tips engraved with the Unitronic logo.


  • Unitronic 3" Catalytic Converter Section
  • Unitronic 3" Downpipe Section
  • Unitronic 3" Resonator Section
  • Unitronic 3" Muffler Section
  • Unitronic 3" V-Band Exhaust Clamps
  • Unitronic 3" V-Band Sealing Rings
  • Unitronic 3" V-Band Adapter
  • All Necessary Hardware Included


 Make Model Years Engine
Audi A4 B8/B8.5 2008-2016 2.0 TFSI/2.0 TSI EA888 Gen 3
Audi A5 B8/B8.5 2008-2016 2.0 TFSI/2.0 TSI EA888 Gen 3