Unitronic 2.5" Cat-Back Exhaust for Audi B8 | B8.5 S4 3.0T - (NLA)

Unitronic is pleased to present its 2.5â€? 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 3â€? double walled tips and engraved with the Unitronic logo.

Dual 2.5" T304 Stainless Steel Mandrel Bent Tubing

T316 stainless steel flanges

Brushed Matte Finish

4" Corrugated Stainless Steel Flex Section

Flow-Match Transitions

TIG Welded Construction

Unique V-Band Fastening System Featuring Clampco® Clamps

Integrated X-Pipe

Sound Reflection

Sound Absorption Technology

Straight-Through, Free Flowing Muffler Design

Polished 3" Double Walled Exhaust Tips

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

Stage 1

Stage 1+

Stage 2+