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Can Auto Performance has been building exhaust products for Audi's performance V6 platforms since the B8 S4 days. The same obsession with material quality, weld integrity, and fitment accuracy that earned CAP's B8 S4 downpipes a zero-failure track record is what went into these downpipes for the EA839 2.9TT.
The EA839 is one of the best engines Audi has ever built. From the factory it's also one of the most muzzled. The twin-turbo exhaust note gets filtered down to something polite and forgettable. These downpipes fix that.
Pull the OEM cats and the character that's been sitting underneath comes through. Louder, rawer, with actual turbo presence at every RPM. Spool response tightens up and EGTs drop under load. If you're building toward Stage 3, downpipes are required hardware at that point anyway. Get them done now
304 Stainless Steel - T304 austenitic stainless throughout, pipe body, flanges, and heat shield mounting. T304 handles the thermal cycling from EA839 exhaust temperatures without scaling, pitting, or degrading. It's also corrosion-resistant in road-salt environments, which matters for Canadian and northern US climates where most of these cars are driven year-round.
TIG Welded and Back Purged - Every CAP downpipe is TIG welded with inert gas back purging at the weld zone. Back purging prevents oxidation on the interior weld bead, the surface that exhaust condensate and acids contact first. Sugared welds corrode from the inside out. Back-purged welds don't. The result is a clean, full-penetration bead on every unit with no porosity and no variation between production runs.
CNC Machined Flanges - Machined to OEM bolt pattern at both the turbo outlet and midpipe junction. Bolt-on installation, no modifications to the OEM exhaust system required.
Integrated Heat Shielding - The EA839's underbody packaging puts the downpipes in close proximity to brake lines, chassis components, and wiring. The heat shielded variant replicates OEM-level thermal protection, keeping radiant heat away from everything around it.
CAP Limited Lifetime Warranty - No time limit. No exclusions for material or weld defects. The same warranty CAP offers on every exhaust product.
On stock turbos, removing the cats on the EA839 does not add measurable peak power. What changes is exhaust note, transient spool responsiveness, and EGTs. If you're after horsepower, tune first. This is the mod you do because you want your RS5 to sound like an RS5.
The removal of factory catalytic converters will trigger a check engine light. Software tunes are recommended to maximize the power gains.
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.
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Products are warrantied by their manufacturer. Eurosport Performance is an authorized reseller: every part we sell is covered by the manufacturer's own warranty, with its own terms and duration. Claims go through us, so you deal with Eurosport Performance rather than a form on the brand's site, but whether a claim is accepted is the manufacturer's decision.
Manufacturer terms apply Duration and coverage are set by the brand and differ from one to the next: some cover one year, some a lifetime, some only the original purchaser. The brand's warranty page is the reference; ask us if you cannot find it. | We file the claim for you Contact us with your order number, photos and a description of the issue. We open the claim with the manufacturer, follow it up, and arrange the repair, replacement or credit they approve. The manufacturer decides whether the claim is accepted. |
Fitment guarantee: North America only We guarantee fitment for vehicles sold in the North American market. Vehicles from other markets are out of scope; specifications differ, and it is the customer's responsibility to confirm compatibility before ordering. | No warranty on tuning files ECU and TCU tunes and other software files are sold without warranty and are not returnable once delivered or flashed. Tuning can affect your vehicle's factory warranty; please read the brand's terms before purchasing. |
Proof of purchase Your Eurosport Performance order is the proof of purchase every manufacturer asks for. Keep the order confirmation; it is also in your account on the site and in the SPECD app. | What is usually not covered Damage from improper installation, modification, abuse, racing or an incorrect application for the vehicle, and normal wear items such as pads, clutch discs and filters. Shipping and labour are covered only when the manufacturer's terms say so. |
It is the manufacturer's warranty for that product. Where the brand publishes it, we note it in the description; otherwise contact us before ordering and we will confirm the exact terms with them.
Stop using it if it is a safety-related part, then contact us with your order number, clear photos, and when and how the issue appeared. Do not return anything until we confirm the claim; manufacturers often require an inspection or an authorization number first.
The manufacturer. We prepare and submit the claim, provide the proof of purchase and push for a fair outcome, but acceptance, replacement or credit is their call under their terms. We pass their decision on to you as soon as we have it.
It depends on the manufacturer. Simple cases are approved in days; claims that need the part inspected can take a few weeks. We keep you updated at each step and push when it drags.
No. Tuning files are software; once delivered or flashed they cannot be returned, and they carry no warranty from Eurosport Performance or, in most cases, from the tuner. Support for the tune itself (revisions, flashing questions) comes from the tuning brand under its own terms.
No. Our fitment guarantee covers vehicles sold in the North American market only. European, Japanese and other market vehicles can differ in engines, electronics and dimensions, and a part listed for the North American model is not guaranteed to fit. If you order for one of these vehicles, confirming compatibility is your responsibility, and fitment issues on such vehicles are not covered by returns or warranty.
Labour is not covered unless the manufacturer's terms specifically include it. Having the part installed by a qualified shop protects your claim: improper installation is the most common reason a manufacturer declines.
No. Returns cover unused parts you no longer want, under our refund policy. Warranty covers a part that fails in use, under the manufacturer's terms. If you are unsure which applies, contact us and we will point you to the right one; please do not open a bank dispute, as it pauses both processes.
Questions about coverage before you buy? Email us with the product and your vehicle and we will confirm the manufacturer's terms.
