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Milltek Hi Flow Sports Cat Downpipe with OPF Bypass, a fantastic exhaust modification for your Mk8 Golf R that delivers outstanding performance when used as a stand-alone upgrade or paired with the Milltek Mk8 Golf R OPF Back System.

Eliminating the factory OPF and upgrading the stock catalytic converter provides significant benefits in terms of airflow and exhaust sound. By bypassing these restrictive components, back pressure is substantially reduced, leading to an incredible exhaust note at an affordable price and unlocking greater tuning potential compared to the stock system.

Milltek Sport exhausts are crafted from high-quality type 304 aircraft-grade stainless steel, which is anti-magnetic and less susceptible to discolouration than other manufacturers' stainless steel. This premium material is used throughout the entire construction, including pipework and silencers. Mandrel bending ensures full-flow bends for improved gas flow, and the exhaust systems feature an increased bore for ultimate performance without compromising mid-range torque. Every Milltek Sport exhaust is designed, developed, and manufactured in-house in the UK.

*Only compatible with OPF-equipped vehicles.


  • High-quality type-304 aircraft-grade stainless steel
  • Precision, quality-controlled manufacturing to ISO 9001 standards
  • Significant weight savings over original equipment exhaust systems
  • Reduced back pressure
  • Sharper throttle response
  • Designed & manufactured in the UK

Compatible models


  • Volkswagen Golf R Mk8 (2021+) OPF-equipped vehicles ONLY
At Racehaus, we value customer satisfaction above all else. We strive to ensure that all products are in stock and ready to ship. However, in the instance that a product is not immediately available, we will promptly notify you before you place your order, so you can avoid any disappointment. 

Our typical turnaround time for dispatch is between 2 to 5 days. Shipping starts from as little as £5.99

Please note that this timeframe may be subject to supplier availability. We take pride in being transparent about lead times, and if a product has a longer lead time, we will personally contact you to provide updates on the shipping process. 

Let us take care of all your product needs with excellent customer service.
We are happy to inform you that we offer worldwide shipping on all our products. You can place your order with confidence knowing that we are committed to maintaining a high level of service quality. 

In case you need to return your product, we offer a 14-day return policy. Please refer to our returns policy for more details. 

Additionally, to give you extra peace of mind, This product comes with a manufacturer's warranty. You can check our warranty policy for more information.

We're committed to providing you with personalised support and assurance with all your order decisions. Our team is constantly striving to improve your experience with us, and we stand behind every product we sell. We're here to help answer any questions you may have. 

Don't hesitate to contact us for more information or assistance.

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