Legendary Brands. Serious Performance.
-10%
New
Milltek Sport Audi TT RS (8S) 80mm Cat-Back Exhaust System
Price range: £2,192.20 through £2,524.83
Milltek Sport Audi TT RS (8S) 80mm Cat-Back Exhaust System
The Milltek Sport cat-back exhaust system for the Audi TT RS (8S) is a purpose-built upgrade designed to improve exhaust flow, sharpen throttle response, and give the TT RS a more characterful sound. Whether you want a refined daily driver or something that’s more vocal on track days, there is an option here to suit.
A cat-back system replaces everything from the catalytic converter backwards – the mid-pipe, centre section, and rear tailpipes. It is one of the most popular and straightforward exhaust upgrades available, giving a noticeable improvement in sound and feel without requiring engine management changes.
Resonated or Non-Resonated?
This system is available in two configurations, so you can choose the sound level that suits you best.
Resonated (Quieter – EC Approved): Includes a resonator – a sound-dampening chamber built into the exhaust – to take the edge off the exhaust note. The result is a noticeably sportier tone compared to the standard exhaust, but one that remains comfortable for everyday use. This version carries EC type approval, meaning it meets road noise regulations and is fully road legal.
Non-Resonated (Louder): Removes the resonator for a fuller, more aggressive exhaust note. This is the choice if you want the TT RS to sound the part – particularly at higher revs and under hard acceleration. Best suited to those who enjoy a more vocal driving experience.
Why Upgrade the Exhaust on the Audi TT RS?
The Audi TT RS 2.5 TFSI five-cylinder engine has a distinctive character all of its own – an unmistakable sound that the standard exhaust partially suppresses. The Milltek system frees up that character, giving the five-pot the voice it deserves.
Beyond sound, the 80mm pipework – larger than the factory system – allows exhaust gases to exit more freely. This helps throttle response feel sharper and more immediate. Paired with an engine tune or other bolt-on modifications, improved exhaust flow can contribute to further performance gains, though on its own the primary benefit is sound and refinement.
Constructed from T304 stainless steel, the system is built to resist corrosion and withstand long-term use both on the road and on track. Milltek Sport is a well-established UK manufacturer with a strong reputation across the Audi and VAG (Volkswagen Group) performance market.
Tailpipe Finish Options
All variants deliver the same performance and sound characteristics. The finish is a purely visual choice:
- Polished – Classic bright stainless steel finish, clean and timeless. Available as SKU: SSXAU961 (Resonated) and SKU: SSXAU963 (Non-Resonated).
- Cerakote Black – A dark matte coating for a stealthy, understated look that works particularly well on black or dark-coloured cars. Available as
Additional Information
| Weight | 36 kg |
|---|---|
| Dimensions | 120 × 74 × 28 cm |
| Brand | |
| System Options | Resonated (Quieter – EC Approved), Non-Resonated (Louder) |
MIL-259 Confirmed Fitment
Our team haven't provided any fitment data for this product yet, please get in touch or check back later!
Stock at Progressive Parts
Delivery timescales are given as estimates in good faith, but cannot be taken as precise or exact information. We highly advise against booking installation/workshop time or engaging in preparatory work until you've received and inspected the goods.
What do our stock statuses mean?
1+ IN STOCK in green stock is readily available in one of our warehouses for express delivery (at the time of viewing).
LOW STOCK in green means we're running low! 1 or 2 left on the shelf so act fast. Over evenings, weekends and bank holidays this stock can move quickly so please bear this in mind.
0 IN STOCK in blue means our primary warehouse does not have unallocated stock, but our UK partners do. Often these can be shipped quickly and efficiently. You'll be notified via the Track My Order page if further delays are unavoidable.
MADE TO ORDER in blue means we've partnered with a supplier which primarily makes their products to order. It's not on our shelf, but your order goes into production immediately.
0 IN STOCK in orange means everybody we work with is unfortunately out of stock. Stock is not available in the UK. The best course of action is to place an order to create an allocation from the next batch arriving.
OUT OF STOCK in red. This product is unavailable to order, for whatever reason we're unable to obtain stock or there is an issue with supply/lead times.
We're tuners too!
Our staff are car enthusiasts, we understand the need for speed... This includes getting your orders out the door as quickly and securely as possible!
In some instances, extended lead times are unavoidable. This is as labour-intensive and frustrating for us as it is for you, please know we are doing our best to facilitate your modification goals. Abuse of our staff or systems will not be tolerated.
Thank you, Team PP
In the words of the Vehicle Standards Agency (VCA), type approval provides "confirmation that production and samples of a design will meet specified performance standards".
For emissions components this encompasses noise, emissions and balanced back pressure, which have a strong influence on maintaining engine performance (power), and fuel efficiency. Type approval ensures that an aftermarket component will reach, or exceed the performance standard of the corresponding OE part.
Type-approval then, is a certain guarantee that an end user will receive a product of OE equivalent performance attributes.
Products on the Progressive Parts website that meet this approval will be clearly marked or labelled EC or ECE approved.