Audi S3 8Y Saloon Sedan GPF-back Race System – stainless steel performance upgrade

Turn up the soundtrack on your Audi S3 8Y Saloon with a serious exhaust upgrade that delivers sharper throttle feel, freer breathing and a deeper, more aggressive tone. This UK-engineered stainless system runs from the petrol particulate filter rearwards, replacing the centre and rear sections for a true GPF-back transformation. It is the go-to choice for S3 owners who want a motorsport-inspired note, premium build quality and an easy bolt-on install that keeps the factory catalyst and GPF in place for MOT-friendly road use.

We have fitted these on customer cars and the feedback is consistently brilliant. Louder when you want it, civil when cruising, and built to last. If you are chasing a proper hot-hatch saloon soundtrack for your EA888 2.0 TFSI Quattro, this is the one.

Key benefits

• Built from large-bore 3 inch 76.2 mm stainless steel pipework for improved flow and responsiveness
• Free-flowing, expertly TIG-welded construction for durability and a crisp, motorsport tone
• Race GPF-back non-resonated layout for maximum sound and drama without touching the catalyst or GPF
• Direct replacement for centre and rear sections with all required fittings and gaskets supplied
• MOT compliant configuration that retains the original emissions hardware
• Choice of valved or non-valved setups to suit your driving style

Fitment and compatibility

Designed specifically for the Audi S3 8Y Saloon Sedan 2.0 TFSI Quattro (2020 onwards). This GPF-back exhaust is a straight swap for the OE centre and rear sections and can be fitted without any ECU calibration. Perfect as a cat-back alternative for OPF-equipped models.

Sound levels

Non-resonated Race configuration sound test results:

• Engine at idle in Dynamic mode: 66.8 dB (+10.8 dB over stock)
• Static 3,500 rpm: 89.6 dB (+15 dB over stock)

Expect a deeper idle, stronger mid-range presence and a more exciting top-end note. Ideal for drivers seeking a pronounced tone with everyday usability.

Valved vs non-valved

Valved system: retains the factory valve control. Switching drive modes, for example Comfort to Dynamic, continues to alter the exhaust volume and character as per OE behaviour.

Non-valved system: removes valve operation. Changing drive modes will not change the exhaust sound, but this does not affect how the vehicle runs. The system has been designed with this in mind to deliver a well-judged, consistently sporty note.

What you get

• 3 inch 76.2 mm stainless steel GPF-back centre and rear sections
• All required clamps, fittings and gaskets
• Full manufacturer-backed quality assurance

Why S3 owners choose this system

• Audi S3 8Y Saloon exhaust upgrade that unlocks a proper hot-hatch saloon soundtrack
• OPF-back design for owners searching terms like S3 cat back, S3 OPF back, S3 non resonated system, S3 race exhaust and S3 stainless performance system
• Engineered for EA888 2.0 TFSI flow gains and future tuning potential
• Clean fitment with no cutting of the catalyst or GPF

Professional fitting available

Prefer us to install it for you? Book a professional fitment at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability. We regularly supply and fit S3 8Y exhaust systems and can advise on valved versus non-valved choices to suit your driving.

Popular search terms

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Ready to transform your S3 8Y? Add to basket or contact us for fitting and advice. We are here to help you choose the perfect setup for road, track and everything in between.