Milltek Cast Large Bore Downpipe and Hi-Flow HJS Cat for Audi 8V S3 and VW MK7 Golf R (2015–2020)

Product Description

Upgrade your Audi 8V S3 or VW MK7 Golf R with the Milltek Cast Large Bore Downpipe and Hi-Flow HJS Cat. Designed to reduce back-pressure and improve exhaust gas flow, this system supports increased horsepower and torque when paired with proper tuning.

Constructed from high-quality stainless steel with a high-flow catalyst, this downpipe is engineered for durability, performance, and direct-fit installation.

Key Features and Benefits

• Large bore cast construction for improved exhaust flow
• Improved turbo response
• High-flow 200 cell HJS catalyst
• High-quality stainless steel construction
• Precision fitment
• Supports Stage 2 tune

Vehicle Compatibility

• Audi 8V/8V.5 S3 (2015–2020)
• Volkswagen MK7/MK7.5 Golf R (2015–2019)
  

Installation and Notes

• Select OE or Milltek exhaust fitment
• Stage 2 ECU tune required
• Professional installation recommended for best results
  
• Inspect gaskets and hardware during installation
• Check for leaks after installation
  

Frequently Asked Questions

Q: Will this increase power?
A: Yes. A larger-bore downpipe improves flow and supports higher power levels with proper tuning.

Q: Do I need an ECU tune?
A: Yes. A Stage 2 tune is required.

Recommended Upgrades

• ECU tune
• High-flow air intake
• High-flow catback exhaust system