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




Unitronic is pleased to present its 3" Performance Cat-Back Exhaust System for B8/B8.5 A4/A5. Featuring a TIG welded T304 stainless steel CNC mandrel bent construction and a free flowing design Unitronic's Performance Cat-Back Exhaust System was developed 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 exhaust 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 every v-band flange to ensure 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 the maximum performance possible while maintaining a comfortable and unobtrusive tone inside the cabin. Exiting at the rear exhausts gasses pass through a pair of 3'' double walled polished tips featuring a Unitronic "U" logo.


  • 3-inch T304 Stainless Steel Mandrel Bent Tubing: Quality Material that will not rust and will outlast your vehicle.
  • T316 Stainless Steel V-Band Flanges: Durable rust proof and cnc machined.
  • Direct Bolt-On Fitment: Use all factory exhaust hanger and doesn't require any modification or adjustment.
  • 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.
  • Universal Fitment: Come with OEM size reducer for a direct bolt-on. Optional 3" adapter available for any after market exhaust system or 3" slip fit adjustable link to match to any Unitronic exhaust system.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" Muffler section
  • Unitronic 3" Mid-Pipe w/ Resonator
  • Unitronic 3" V-Band Sealing Rings
  • Unitronic 3" V-Band Exhaust Clamps
  • Unitronic 3" V-Band to 65mm Female V-Band Adapter


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