Milltek Large Bore Downpipe Race Cat - VW Golf MK8 R / Audi S3 8Y - SSXVW674

The Milltek Large Bore Downpipe and Hi-Flow Sports Cat is a turbo-back component engineered for VW Golf MK8 R and Audi S3 8Y models. Direct factory fitment with OEM hangers; works seamlessly with both OE and Milltek Cat-Back systems. Material: T304L stainless steel, mandrel-bent 3" (76.2 mm) bore with high-flow catalyst rated 200 CPSI. Stage 2 ECU software required for optimal results.

Hand-finished construction ensures superior durability and longevity. The high-flow sports catalytic converter maintains emissions compliance while optimizing exhaust scavenging for measurable gains in horsepower and torque across the power band. CNC-formed junctions and precision welding minimize turbulence and flow losses.

Fitment

• VW Golf MK8 R (all years)
• Audi S3 8Y (all years)
• Compatible with OEM cat-back or Milltek Signature Series cat-back
• No modification required

Every downpipe is dyno-tested and EC Approved for real-world performance gains, not marketing promises.

Fits Milltek Cat-Back.

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Specifications

• Pipe diameter: 94mm (3.70")
• Fitting time: 3 to 4 hours, including removing the factory system
• Off-road / competition use only. Not legal for use on public roads in the US.

Fitment

• Audi > S3 > 2.0TFSI Quattro Saloon/Sedan 8Y > 2022 and Later
• Volkswagen > Golf > MK8 R 2.0 TSI > 2022 to 2024
• Volkswagen > Golf > MK8.5 R > 2025 and Later

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.