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8v A3 Quattro Valved Catback Exhaust System

In-house engineered for Audi A3 enthusiasts! Featuring T304 SS Tig-welded 3.0" tubing, a center resonator and a valved muffler assembly.
10X Entries Into Our F80 M3 Sweepstakes
Fits both pre and post facelift sedan models. Now available in LOUDER non-resonated variant!
ECS
ECS
ES#:
4431063
Mfg#:
015517LA 015517LA
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8v A3 Quattro Valved Catback Exhaust System

Starting at: $1174.49
SALE: 1174.49
Starting at: $1174.49
WAS: $1304.99 on 06-13-2026

This product was last offered at the strikethrough price on
06-13-2026


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Non Resonated Valved Catback Exhaust System
Recommended for vehicles that DO NOT have aftermarket downpipes
4699051 015517LA02KT
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On Order
Est. Ship Date:
on Oct 29, 2026
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1174.49

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ECS Swivel Exhaust Tips - 4.0" Chrome - Pair
Stainless Steel exhaust tips featuring swivel attachment for maximum adjustability. 4.0" Double Wall, Slant Cut Outlet
4305445 003358ECS03-01KT
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SAVE 5% $227.99

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216.58
ECS Swivel Exhaust Tips - 4.0" Black Chrome - Pair
Stainless Steel exhaust tips featuring swivel attachment for maximum adjustability. 4.0" Double Wall, Slant Cut Outlet
4305449 003358ECS03-02KT
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SAVE 3% $227.99

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221.14
ECS Swivel Exhaust Tips - 4.0" Carbon Fiber - Pair
Stainless Steel / Carbon Fiber exhaust tips. Featuring swivel attachment for maximum adjustability. 4.0" Double Wall, Slant Cut Outlet
4305452 004735LA01-01KT
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SAVE 5% $349.98

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332.48
ECS "Ti.22" UNIVERSAL Exhaust Tips - 4.0" Titanium - Matte Finish - Pair
2.5" Clamp-on Inlet / 4.0" Single Wall, Slant Cut Outlet
4419161 011966LA07-02KT
Availability:
Available from Supplier
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Ships on Mar 18, 2027
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395.74
ECS "Ti.22" UNIVERSAL Exhaust Tips - 4.0" Titanium - Burnt Finish - Pair
2.5" Clamp-on Inlet / 4.0" Single Wall, Slant Cut Outlet
4419163 011966LA07-01KT
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ECS Manifold Port Boost Tap Kit
Installs in the unused port of the intake manifold. Features three vacuum ports for multiple boost / vacuum references.
2986667 013576ECS01
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ECS Throttle Body Boost Tap Kit
Installs between the throttle body and intake manifold. Features two vacuum ports for multiple boost / vacuum references.
2984817 005942ECS01
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Exhaust Pipe Hanger remover Pliers
Remove rubber exhaust hangers quickly and easily with this specially designed tool.
2784927 008778SCH01A
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Product Details

10X Entries Into Our F80 M3 Sweepstakes
Fits both pre and post facelift sedan models. Now available in LOUDER non-resonated variant!

Are you ready to radically transform the driving experience in your Audi 8v A3 2.0T Quattro? Take your docile, stock exhaust and replace it with the ECS Tuning in-house engineered Valved Catback Exhaust System! Our proprietary valved muffler design allows you to toggle between a mild-mannered, sporty Euro. exhaust note, with the valves closed, to a deep, aggressive sound with the valves open. Intoxicating exhaust notes fuel your desire to push your engine to its limits with every ounce of power and every engine revolution. Experience true driving passion with our ECS Valved Catback Exhaust System!

 

Sound clips! Featured in this product highlight on the ECS Tuning YouTube channel:

 

PART DESIGN

  • In-house designed and engineered using FARO ARM laser scanning technology and SolidWorks 3D CAD modeling for precision fitment 

  • 3.0" T304 Stainless Steel CNC Mandrel Bent, Brushed Tubing with 1.25mm wall thickness

  • The beautifully crafted final assembly is artfully Tig-welded and back purged for superior durability and the finest appearance

  • A stainless steel, wool packed resonator cuts down on unwanted drone

  • Features a straight-through 3.0" flow path leading up to the muffler assembly which then splits into dual 2.5" tailpipes for the least amount of restriction and turbulence 

  • Valved Muffler Design:

    • In-house engineered to achieve the most desirable exhaust notes with the largest delta between valve "closed" and valve "open" driving conditions 

    • Perforated tubing combined with stainless wool packing material helps to absorb unwanted volume and minimize drone throughout a specific RPM range

    • Vacuum-actuated exhaust valves provide outstanding reliability in the harshest conditions. Unlike electronic servo motors that are prone to failure, our exhaust valves have been tested in thousands of applications and have proven to be reliable. 

  • ECS Valved Catback Weight: 48 lbs with exhaust tips and downpipe adapter 

  • T304 Stainless Steel 12mm barbed exhaust hangers, featuring 360° hanger stoppers, are Tig-Welded in OE locations for precise location

  • Strategically placed slip joints provide the most adjustability to obtain perfect fitment

  • Designed to maximize ground clearance while still being compatible with aftermarket components, such as larger rear sway bars. 

 

KIT CONTENTS

  • Downpipe adapters (2); 1 for OEM (65mm) downpipe, 1 for 3.0" downpipe, ending at OEM location

  • Accuseal style clamps (4)

  • OEM diameter (65mm) sleeve clamp 

  • 3.0" Resonator / Midpipe Assembly

  • Valved Muffler Assembly

  • ECS 4.0" Swivel Exhaust Tips (2) - Choose chrome, black chrome or carbon fiber

  • Exhaust Valve Controller Installation Kit

    • Remote Key Fobs (QTY 2)
    • Valved Solenoid Control Module with wiring harness to connect control module to pneumatic solenoid
    • Pneumatic Control Solenoid 
    • Silicone Vacuum Tubing  (2mm ID x 16.5' length [QTY 2]) w/ cable ties and T-tap
    • Brass Tee Fittings (2mm nipple [QTY 2])
    • Vacuum Check Valve (2mm nipple)

 

PRODUCT DEVELOPMENT

  • Our ECS Tuning 8v A3 Quattro Valved Catback Exhaust System was designed, engineered, tested and quality inspected by our Research and Development team in our Wadsworth, Ohio facility. We strive for the highest level of precision and quality through leading-edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long term product testing. 

 

INSTALLATION AND SUPPORT

  • Looking for installation tips? Look no further, we put together a full installation tutorial from start to finish including how to remove your OEM parts! See our Installation PDF under the INSTALLATION Tab for more information. 

  • * A manifold vacuum source is required to activate the interactive exhaust valves --- This is NOT included but available under ES#2986667 (intake manifold port) or ES#2984817 (throttle body)*

 

Cross Reference
  • 8V5 253 609 J
  • 5Q0 253 409 C
  • cat-back
  • cat back

This Part Fits the Following Vehicles

Make Model Submodel Engine Special Fitment Notes
Audi A3 8V Quattro 2.0T Use vehicle selector to confirm fitment
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.
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