CAP C8 Catless 2.9T Downpipe
From the same team that brought the world the best test pipes on the market. Introducing the CAP 2.9T Catless Downpipe for the C8 S6/S7.
Its time to increase the power potential on your C8 Audi S6/S7. Features a 301 stainless steel construction, allowing for smoother flow transitions and enhanced durability. Designed for enthusiasts who demand both performance and precision, this downpipe doesn’t just look the part, it delivers results. We also offer a heat shielded variant, which helps reduce engine bay temperatures
Key Features Of Our 2.9T Downpipes For C8 S6/S7 Platform:
-
304 Stainless Steel Construction — Corrosion-resistant and built to handle sustained exhaust gas temps without degrading
-
100% TIG Welded & Back-Purged — Prevents weld-side oxidation (scaling) inside the pipe, keeping flow clean and joints strong long-term
-
Precision CNC-Machined Flanges — OEM-matched bolt pattern, no cutting, drilling, or modification required
-
Bolt-On Installation — Direct fit, factory mounting locations retained
-
Enhanced Flow — Removes the factory catalytic converters' flow restriction for faster turbo spool and improved throttle response
-
Aggressive Exhaust Note — Deeper, more resonant tone versus the stock catted setup
-
Optional Heat Shield — Available as an upgrade for owners prioritizing engine bay thermal management (CAP-EXH-100)
Is a Catless Downpipe Worth It for Your Audi 2.9T?
For C8 S6/S7 owners chasing turbo response and sound, a catless downpipe is one of the most impactful bolt-on mods for the platform, it removes the single largest flow restriction between the turbos and the rest of the exhaust.
| Benefit |
CAP Downpipe |
Stock Downpipe |
| Turbo Spool Response |
Faster, less restriction |
Restricted by factory cats |
| Exhaust Note |
More aggressive |
Muffled, OEM tone |
| Warranty |
Lifetime |
Limited |
Gains vary with tune and supporting mods — a software tune is required to see the power gains and to keep fueling/timing in check with the cats removed.
The removal of factory catalytic converters will trigger a check engine light. Software tunes are recommended to maximize the power gains. Although professional install is always recommended, the install time of this downpipe generally only takes around the 2 hour mark.
Heat Shielded vs. Non-Heat Shielded Downpipes — What to Choose?
Choosing between the Regular and Heat Shield variants comes down to how you use the car and what's already in your engine bay.
Benefits of the Heat Shield variant (CAP-EXH-100):
-
Reduced Heat Soak — Limits radiant heat transfer into the engine bay during extended hard driving or track use
-
Engine Bay Component Protection — Adds a layer of separation between the downpipe and nearby wiring, lines, and sensors
-
Better Suited to Track/Repeated Pulls — Where sustained high EGTs make heat soak more of a factor than a single spirited drive
Benefits of the Regular variant (CAP-EXH-086):
-
Lower cost
-
Lighter — no added shield mass
- Sufficient for street driving where sustained high-load runs are infrequent
Important Notice:
This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles. By purchasing this product you acknowledge its intended use and represent that you understand and agree that the product is not designed to meet any applicable emissions standards, the product is not C.A.R.B. complaint. Can Auto Performance makes no representations, warranties or claims that this product complies with any applicable emissions laws and expressly disclaims any and all such representations, warranties and claims, whether express or implied. By purchasing this product, you represent, warrant and agree that it is your responsibility to inform yourself of any laws or regulations that may apply to your purchase and/or use of the product.
