Milltek Large Bore Downpipe HJS Hi-Flow Cat - NO CEL - VW Golf MK8 R / Audi S3 8Y - SSXVW672

The Milltek Cat Back Large Bore Downpipe and Hi-Flow Sports Cat is a direct-fitment turbo-back component engineered for the VW Golf MK8 R and Audi S3 8Y (EA888 platform). This system pairs seamlessly with OEM or Milltek Cat-Back exhausts, delivering measurable gains in exhaust scavenging and engine efficiency.

Constructed from T304L stainless steel with mandrel-bent 3" (76.2 mm) bore tubing, the downpipe features a high-flow sports catalytic converter (200 CPSI) that balances emissions compliance with flow optimization. Hand-finished construction ensures OEM+ fitment quality without modification. The secondary catalyst design maintains backpressure management across the rev range while supporting dyno-proven performance gains.

Fitment & Compatibility

• VW Golf MK8 R (EA888 Gen 4)
• Audi S3 8Y (EA888 Gen 4)
• Compatible with OEM factory cat-back systems
• Direct compatibility with Milltek Cat-Back Exhausts
• No modification required for installation

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.