Audi S3 (8Y) 5 door Sportback Front Downpipe Sports Cat / De-Cat Performance Exhaust

Audi S3 8Y Sportback Downpipe Upgrade with 200 cell sports catalyst or catless option

Unlock more sound and sharper response from your S3 8Y with this premium turbo downpipe assembly, available as a high flow 200 cell sports cat or a straight through catless version. Built for cars equipped with a GPF, this is the front section that transforms exhaust flow right from the turbo outlet for serious tuning headroom and a deeper, sportier tone.

Our team at MJ Modifications has fitted these on customer cars and the feedback has been excellent. Strong build quality, precise fitment and a proper step up in performance potential and soundtrack. If you are planning a Stage 2 map on the EA888 2.0 TSI, this is the key hardware piece that reduces back pressure, improves turbo spool and sets you up for future power goals.

Why enthusiasts choose this unit

• High flow 200 cell 4.5 inch catalyst option for improved gas velocity and tuning potential
• Catless pipe option for maximum flow on track and closed course use
• Large bore 3 inch 76.2 mm stainless steel pipework with smooth mandrel bends
• Expert TIG welded construction for strength, durability and a factory like fit
• Designed for the EA888 Gen 4 2.0 TFSI in the latest quattro hot hatch

Fitment and compatibility

• For S3 8Y five door hatch with GPF only
• Replaces the front factory section at the turbo outlet
• All relevant fittings and gaskets supplied except the turbo clamp

Sound and performance benefits

• Freer flowing path right off the turbine housing for sharper throttle response
• Noticeably richer, more aggressive exhaust note without drone when paired with stock rear sections
• Opens up the calibration window for Stage 2 tuning and future hardware upgrades

Important legal and technical notes

• Catless version is strictly for motorsport and off road use only
• Sports catalyst version is not EC homologated and may not meet road emissions requirements in your region
• This product removes the GPF also known as PPF or OPF
• Engine management light will illuminate if not calibrated. Mapping is required at the time of fitting to code out related faults

Professional installation

Want it fitted right first time with mapping support and care for your vehicle. Book installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Quality you can trust

Crafted in high grade stainless steel with precision welds and quality control throughout. This is a proven upgrade from a respected UK manufacturer, built to handle heat cycles and daily use on fast road cars as well as track toys. Our customers love the transformation and so do we.

Tech highlights

• Large bore 3 inch 76.2 mm stainless tubing
• 200 cell 4.5 inch 114.3 mm high flow sports cat option
• TIG welded with smooth transitions to reduce turbulence

Who is it for

Perfect for drivers chasing better flow, a stronger soundtrack and the foundations for Stage 2 power on the S3 8Y platform. Ideal for track day fans, tuning professionals and anyone who wants the EA888 to breathe properly.

Search friendly terms

Audi S3 8Y downpipe, S3 2.0 TFSI EA888 turbo outlet pipe, OPF delete pipe, GPF removal kit, S3 cat downpipe upgrade, 200 cell catalytic converter, catless decat pipe, stainless steel performance exhaust front section, quattro hot hatch tuning parts, Stage 2 hardware, high flow front pipe.