Milltek SSXAU554 Catted Downpipes/Front Pipes 100-Cell Hi-Flow Sports Cats 76mm (3in) for Audi C7 RS6 RS7 S6 S7 4.0 TFSI V8 Bi-Turbo | Big-Bore Turbo Outlet Pipes | Cerakote | Stage 2/ECU Remap | For Milltek Cat-Back

Milltek SSXAU554 Big-Bore Front Pipes with 100 CPSI Performance Catalysts for Audi C7 4.0T

Unlock the full potential of your Audi 4.0 TFSI V8 with this premium front section from Milltek Sport. The SSXAU554 assembly pairs large-diameter 76.2 mm turbo outlet pipes with 100 CPSI metallic performance converters to improve gas flow, sharpen spool and deliver that deep, hard-edged V8 tone. Finished in a durable Cerakote semi-gloss black on the primary pipes for heat control and longevity, this setup is designed to be used with the matching Milltek rear system on remapped vehicles for a transformative upgrade.

Search-friendly terms for owners and tuners: Audi RS6 C7 4.0T front pipes, RS7 4.0 twin turbo exhaust upgrade, S6 C7 performance catalysts, S7 Sportback 4.0T big-bore turbo outlets, 3 inch 76mm front section, 100 cpsi metallic cats, UK-made exhaust hardware, Cerakote coated front pipes, C7 chassis 4.0T upgrade, ECU tune hardware, turbo-back flow improvement.

Why this Milltek front section is a winner

• Big-bore 76.2 mm tubing to reduce restriction and help the twin-turbo 4.0T breathe for stronger midrange and faster response.
• 100 CPSI metallic performance catalysts that maintain emissions hardware while maximising throughput for tuned applications.
• Cerakote semi-gloss black finish on the primary turbo outlet pipes for superior thermal management and corrosion resistance.
• UK engineered and manufactured by Milltek Sport with decades of exhaust development experience.
• Built to complement ECU-calibrated vehicles and must be paired with a Milltek Sport rear section.

What you receive

• Left-hand 76 mm primary turbo outlet pipe with Cerakote semi-gloss black finish
• Right-hand 76 mm primary turbo outlet pipe with Cerakote semi-gloss black finish
• Left-hand secondary 100 CPSI metallic performance catalyst
• Right-hand secondary 100 CPSI metallic performance catalyst

Key specifications

• Tubing diameter: 76.20 mm 3.00 inch
• Finish: Cerakote semi-gloss black on the primary front pipes
• Layout: Primary catalyst bypass pipes with underbody 100 CPSI sports catalysts
• Recommended for vehicles with ECU recalibration
• Compatibility: to be used with a Milltek Sport rear system

Vehicle compatibility

• Audi RS6 C7 4.0 TFSI biturbo quattro including Performance models 2013 onwards
• Audi RS7 Sportback C7 4.0 TFSI biturbo including Performance models 2013 onwards
• Audi S6 C7 4.0 TFSI quattro 2012 onwards
• Audi S7 Sportback C7 4.0 TFSI quattro S tronic 2012 onwards

Installation and tuning

• Requires ECU calibration to optimise performance and manage emissions hardware.
• Must be installed in conjunction with a Milltek Sport rear section.
• Professional fitting recommended. MJ Modifications offer expert installation in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Real-world results

We have installed this Milltek setup on multiple customer RS6, RS7, S6 and S7 C7 projects. Feedback is consistently positive, with owners praising the precision fitment, robust build, sharper throttle response and the authentic, rich V8 soundtrack that pairs perfectly with a calibrated 4.0T.

Fitment check before dispatch

We verify compatibility prior to shipping. Add your UK registration or the last 7 characters of your VIN at checkout and we will confirm this kit suits your exact C7 4.0 TFSI model.

Manufacturer

Milltek Sport. UK-designed and manufactured performance exhaust components with continuous development informed by road and track testing.

Part number

SSXAU554

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