MILLTEK HI-FLOW CATS FOR B9 AUDI RS4 & RS5 (OPF / GPF)
In Stock
Milltek Hi-Flow Cats for B9 Audi RS4 & RS5 (OPF / GPF)
The HJS High-Flow Sports Catalyst sets the standard as the top-performing and highest quality aftermarket catalyst available. Designed to decrease the cell density found in standard OEM catalysts, typically between 500-600 cells, this product reduces it to 200 cells. This reduction allows for a more free-flowing catalyst, enhancing gas flow and overall performance while still complying with emission regulations for everyday use.
Specifications
- Pipe Diameter: 70mm (2.76″)
- EC Approved: No
- Motorsport Use Only: No
What’s Included
- LH hi-flow catted downpipe & OPF / GPF bypass
- RH hi-flow catted downpipe & OPF / GPF bypass
Applications
- Audi RS4: B9 (2018+) – 2.9L Bi-Turbo TFSI V6
- Audi RS5: B9 (2017-2018) – Coupe, Avant, Sportback – 2.9L Bi-Turbo TFSI V6
- Audi RS5: B9.5 (2019+) – Coupe, Avant, Sportback – 2.9L Bi-Turbo TFSI V6
Notes
- Only compatible with cars that are OPF / GPF equipped
About Milltek
Milltek is committed to designing performance exhaust systems that are tailored to the needs of the driver, covering an increasingly broad spectrum of vehicles. The company is dedicated to ongoing innovation, with its research & development team working tirelessly to bring to market the most sought-after exhaust solutions. Manufactured in the UK and distributed to over 90 countries worldwide, Milltek Sport stands as one of the most widely available performance aftermarket brands, continually striving to meet the evolving demands of performance exhaust enthusiasts around the globe.
0.00
Average of 0 reviews
We want you to feel confident before making your purchase. Here are a few important details to help you better understand this product and how it fits into your space.
- Please review the product dimensions carefully to ensure the right fit for your space
- Color may vary slightly due to lighting and screen settings
- Materials and finishes are selected for both durability and visual appeal
- Some items may require simple assembly upon delivery
- Perfect for both everyday use and long-term comfort
If you have any questions about this product, feel free to reach out to our support team. We're here to help you make the right choice.
Related Products
Discover compatible parts and popular upgrades that pair well with this product.
Fast Worldwide Shipping
Tracked dispatch on all in-stock orders.
Expert Support
Our team knows cars — get real advice.
Secure Checkout
Encrypted payments you can trust.
We use cookies to improve your experience. By continuing, you agree to our cookie policy.
I AcceptYour Cart
Add $500.00 more to get free shipping!
![Urban Automotive Lower Ducktail Extension Spoiler for Lamborghini Urus S [430-0032]](https://automotiveriser.com/wp-content/uploads/2026/09/No_photo_description_available_-2-300x300.jpg)
Product Size Guide
Please refer to the general size reference below to better understand how this product may fit into your space. Dimensions may vary slightly depending on the design and materials.
| Category | Small | Medium | Large |
|---|---|---|---|
| Decor & Accessories | Up to 10″ | 10″ – 20″ | 20″+ |
| Tables | Up to 30″ | 30″ – 60″ | 60″+ |
| Seating | 1 Seater | 2–3 Seater | 4+ Seater |
| Storage Units | Compact | Standard | Large Capacity |
| Lighting | Small Fixture | Standard Fixture | Large Fixture |
Note: For exact product dimensions, please refer to the specifications section above. This guide is intended as a general reference only.
MILLTEK HI-FLOW CATS FOR B9 AUDI RS4 & RS5 (OPF / GPF)
- Email:info@automotiveriser.com
- Support:Contact Us
Reviews
There are no reviews yet.