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Unitronic Cat-Back For B8/B8.5 S4(UH011-EXA)Select Vehicle

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Description
Unitronic is pleased to present its 2.5” Cat-Back Exhaust System for the B8/B8.5 S4. Featuring TIG welded T304 Stainless Steel CNC mandrel bent construction, T316 stainless steel flanges, and a straight-through, free flowing design; Unitronic’s Cat-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 Cat-Back Exhaust System features a high density, high temperature glass fiber muffler packing, and engraved 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 tips and engraved with the Unitronic logo.
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Features / Benefits
  • Dual 2.5-inch T304 Stainless Steel Mandrel Bent Tubing:
    Top quality material that will not rust and will outlast your vehicle.
  • T316 Stainless Steel Flanges:
    Durable, rust proof and laser cut.
  • Brushed Matte Finish:
    Brushed matte finish for the best possible look.
  • 4-inch Corrugated Stainless Steel Flex Section:
    High quality flex with interlock construction that will stay leak proof for years; allows engine movement without stressing the factory rubber mounts
  • Flow-Match Transitions:
    Flow-matched transitions for maximum performance and airflow.
  • TIG Welded Construction:
    Professionally TIG welded to ensure longevity, durability and top tier craftsmanship.
  • Unique V-Band Fastening System Featuring Clampco® Clamps:
    Maintain a perfect alignment of v-band flanges while ensuring a leak-proof connection every time. Fully reusable and quick to install.
  • Integrated X Pipe:
    Reduce unwanted sound frequency; unique exhaust tone.
  • Sound Reflection:
    Sound reflection chamber used to cancel drone noise and to ensure comfortable sound level in the cabin.
  • Sound Absorption technology:
    Perforated chamber packed with high quality and durable high temperature fiberglass wool; ensures a deep tone while absorbing unwanted frequency.
  • 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.
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Hardware Included
  • Unitronic Left Downpipe Section
  • Unitronic Right Downpipe Section
  • Unitronic Front Resonator Section
  • Unitronic Mid Resonator Section
  • Unitronic Left Rear Muffler
  • Unitronic Right Rear Muffler
  • All Necessary Hardware Included
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Recommended Software
  • Stage 1
  • Stage 1+
  • Stage 2+
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Locate Dealer
$2,299.99USD
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Video
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Install
Featuring a unique v-band fastening system and engineered using the latest in 3D modeling technology, Unitronic Performance Exhaust Systems are made easy to install.
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Difficulty Level:
3 / 5
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Unitronic Corporation Inc. is not affiliated with the Unitronics Group of Companies. To reach Unitronics Group please follow this link http://www.unitronics.com