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ECS Tuning MQB MK7/7.5R Audi 8V S3 T304 Stainless Steel 3.0" Downpipe With High Flow Cat

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Original price $1,249.95
Current price $1,199.95

Product availability:

  • Shipping method: Drop shipped
  • Shipped from ECS Tuning facility within 3-5 business days.
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    ECS Tuning MQB MK7/7.5R Audi 8V S3 T304 Stainless Steel 3.0" Downpipe With High Flow Cat

    The perfect way to unleash hidden horsepower in your VW MK7 Golf R or Audi 8v A3/S3 is to upgrade the restrictive factory downpipe with a smoother, higher flowing unit. Our ECS Tuning MQB 4Motion / MQB Quattro High Flow Catted Downpipe will increase performance and add a sophisticated growl to the exhaust note. Ideal performance is achieved through expelling exhaust gasses at maximum velocity through a larger diameter, freer flowing downpipe due to smoother bend radius, larger internal diameter, and a less-restrictive catalytic converter. We measured maximum gains of +20 ft/lbs of wheel torque and +6 AWHP on a VW MK7.5 Golf R (DSG) when equipped with our ECS Tuning Luft-Technik Intake System on stock software and through the OE catback exhaust. 

    Our High Flow Catted Downpipe Kit is designed to not only free up horsepower, independent of software changes, but to allow more aggressive ECU tuning which nets even further increases in engine output when combined with our Downpipe Kit. In-House Designed and Engineered with sophisticated 3D modeling software, our kit utilizes only premium materials and technologically advanced development techniques to deliver unmatched quality and reliability. 


    • In-house designed and engineered with Solidworks 3D modeling and FARO arm technology 

    • Mandrel-bent 3.0" T304 stainless steel material with an attractive brushed finish

    • 1.5mm (1/16”) wall thickness for improved durability and reduced in-cabin noise 

    • Fully TIG welded for exceptional appearance and durability

    • Precision CNC machined V-Band flange to achieve the best exhaust flow out of the turbocharger

    • 200-cell high flow metallic catalytic converter placed furthest upstream as possible for quicker catalyst warm-up and for factory O2 sensor placement

    • Stainless steel mesh flex section 

    • Adjustable downpipe bracket with barbed hangers

    • Stainless steel clamps with zinc-coated hardware 

    • Flared Downpipe-to-Catback reducer and sleeve clamp for OE catback exhaust systems 

    • Strategically placed slip joints provide the best range of adjustability, in order to obtain a perfect fitment


    • Net gain of +20 WTQ and +6 AWHP on stock ECU software, compared to stock downpipe

      • Increase of ~0.8psi of boost pressure 

      • Overall area under the curve increase of +3.8% wheel torque and +4% wheel horsepower 

    • Net gain of +91 WTQ and +47 AWHP when combined with APR Stage 2 software, compared to stock software & downpipe 

    • More sophisticated growl to the exhaust 


    • 3.0" High Flow Catted Downpipe w/ extension pipe 

    • OE catback reducer 

    • Replacement OE-style sleeve clamp 

    • CNC-machined downpipe bracket with mounting hardware

    • QTY 2 exhaust clamps 

    ECS part number: #ES#4004495