Milltek Hi-Flow Sports Cat and Downpipe (200 Cell HJS High Flow Sports Cat) - Audi S4 and S5 (B9) 3.0 V6 Turbo 2016 on and A6 and A7 55 TFSI (C8) 3.0 V6 Turbo 2019 on
Milltek
- SKU:
- SSXAU673
- Type:
- Exhaust
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Hi-flow sports catalytic converter assembly with downpipe for the Audi S4 and S5 (B9) and the A6 and A7 55 TFSI (C8). It replaces the original catalytic converter section and works with the original or a Milltek cat-back system.
Features
- 200 cell HJS high flow sports catalytic converter
- Works with the original or a Milltek cat-back system
- 304L stainless steel, made in the UK
- Estimated fitting time: 1 to 1.5 hours, including removal of the original system
Specifications
- Part number: SSXAU673
- System type: Hi-flow sports cat and downpipe
- Pipe diameter: 63.5 mm
- ECE approved: No
- Race product: Yes
- For off-road and motorsport use only.
In the kit
- High Flow Cat Assembly (MSAU704)
Fitment
- Audi A6 55 TFSI (3.0 V6 Turbo) C8, 2019 on
- Audi A7 55 TFSI (3.0 V6 Turbo) C8, 2019 on
- Audi S4 3.0 Turbo V6 B9, Saloon/Sedan and Avant (non sport diff models), LHD and RHD, 2016 on
- Audi S4 3.0 Turbo V6 B9, Saloon/Sedan and Avant (sport diff models only and without brace bars), LHD and RHD, 2016 on
- Audi S5 3.0 V6 Turbo Coupe Only B9 (LCI, non-GPF only, sport diff models only and with brace bars), left-hand drive only, 2019 on
- Audi S5 3.0 V6 Turbo Coupe Only B9 (non-GPF only, sport diff models only and with brace bars), right-hand drive only, 2017 on
- Audi S5 3.0 V6 Turbo Coupe Only B9 (non-GPF only, sport diff models only and without brace bars), LHD and RHD, 2017 on
- Audi S5 3.0 V6 Turbo Coupe/Cabrio B9 (non-GPF only, non sport diff models only), LHD and RHD, 2017 on
- Audi S5 3.0 V6 Turbo Sportback B9 (non-GPF only, non sport diff models only), LHD and RHD, 2017 on
- Audi S5 3.0 V6 Turbo Sportback B9 (non-GPF only, sport diff models only and with brace bars), LHD and RHD, 2017 on
- Audi S5 3.0 V6 Turbo Sportback B9 (non-GPF only, sport diff models only and without brace bars), LHD and RHD, 2017 on
Important
- The S5 fitments are non-GPF cars only
- Left-hand and right-hand drive cars are covered, see fitment above
Before you order
Contact us with your registration or VIN and we will confirm fitment before you order.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.




