Unitronic 3" Downpipe For B8/B8.5 A4/A5

Constructed of 3" T304 stainless steel mandrel bent tubing, T316 stainless steel flanges, a corrugated stainless steel flex section, and TIG welded fabrication, this downpipe is built to withstand the test of time, while performing to the max. All Unitronic downpipes come equipped with a 200-cell high flow metallic catalytic converter and all transitions are flow-matched to allow for maximum performance and airflow.

In addition, Unitronic exhausts feature an easy-to-use v-band exhaust fastening system to ensure a fast and effortless installation and precise fitment. To finish it off, an OEM-inspired catalytic converter heat-shield protects against unwanted heat radiating in the exhaust tunnel. Every Unitronic Exhaust System comes embossed with a Unitronic logo, equipped with an individualized serial production plate to ensure authenticity, and a brushed matte finish for an elegant appearance that will last a lifetime.

Features: 

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 Absorption Technology:

Perforated chamber packed with High quality and durable high temperature Fiberglass wool. Ensure a deep tone and unwanted frequency absorption.

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.

Hardware Included: 

• Unitronic B8 & B8.5 A4/A5 3" Downpipe
• Unitronic B8 & B8.5 A4/A5 3" Catalytic Converter Section
• Unitronic 3" V-Band Exhaust Clamps
• Unitronic 3" V-Band to 65mm Female V-Band Adapter
• Unitronic 3" Seal Rings