{"product_id":"cap-3-0t-catless-downpipe-for-2018-2024-b9-b9-5-audi-s4-s5","title":"CAP 3.0T Catless Downpipe for 2018-2024 B9\/B9.5 Audi S4\/S5","description":"\u003ch3\u003e\u003cspan\u003e\u003cstrong\u003eCAP B9\/B9.5 Catless 3.0T Downpipe \u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eIntroducing the\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003elong awaited V3 Cast Catless Downpipe\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003efrom\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eCanadian Auto Performance!\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eThe most refined and powerful evolution of our high-flow downpipe lineup for the B9 S4\/S5 3.0T platform.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFor 2025, we’ve taken everything that made our V1 and V2 downpipes great and raised the bar even higher. This all-new\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eV3 version features a cast stainless steel construction\u003c\/b\u003e\u003c\/span\u003e, allowing for\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003esmoother flow transitions and\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eenhanced durability.\u003cbr\u003e\u003c\/strong\u003eWe also offer a heatshielded variant, which help\u003cstrong\u003e \u003c\/strong\u003ereduce engine bay temperatures.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDesigned for enthusiasts who demand both performance and precision, this downpipe doesn’t just look the part, it delivers results.\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt's time to increase your B9 Audi S4\/S5's power, by increasing exhaust flow with this Cast downpipe.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eExperience increased horsepower, faster turbo response, and a meaner exhaust note. Easy to install and built to last your car's lifetime.\u003cbr\u003e\u003cbr\u003eWe have to thank Audi for the design of the OEM cat, compared to the B8\/B8.5 S4\/S5 platform, replacing cats was a total nightmare on those cars. Although professional install is always recommended, the install time of this downpipe generally only takes around the 2 hour mark.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003e\u003cstrong\u003eKey Features Of Our 3.0T Downpipe For B9\/B9.5 Platform:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eCast 304 Stainless Steel Construction\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e– Stronger, smoother, and more thermally stable\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eIntegrated Heatshield\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e– Keeps under-hood temps in check and protects nearby components\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eTIG Welded \u0026amp; Back-Purged\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e– Ensures strength and durability where it matters\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003ePrecision-Cut CNC Flanges\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e– OEM-like fitment, no cutting or welding required\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eBolt-On Installation\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e– Includes all necessary hardware, gaskets \u0026amp; bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eEnhanced Flow\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e– For increased HP, torque, and turbo response\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eAggressive Exhaust Note\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e– Deep tone without drone on stock exhaust\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eTuned Aesthetic\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e– Clean, robust, and designed to impress at first glance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb id=\"docs-internal-guid-a07cd3be-7fff-2b8a-cf02-29ddd38b3531\"\u003e\u003cem\u003eImportant Note\u003c\/em\u003e\u003cspan\u003e: \u003c\/span\u003e\u003c\/b\u003eThe removal of factory catalytic converters\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/mechanics.stackexchange.com\/questions\/80598\/does-cat-removal-disable-check-engine-light\"\u003ewill trigger a check engine light\u003c\/a\u003e. Software tunes are recommended to maximize the power gains.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eHeat Shielded vs. Non-Heat Shielded Downpipes - What to Choose? \u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen it comes to choosing between heat shielded and non-heat shielded downpipes for your Audi B9\/B9.5 S4\/S5, understanding the pros and cons of each option will help you maximize performance and protect your engine components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eHere’s a quick overview to make things easy: \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eBenefits of Heat-Shielded Downpipes for your B9\/B9.5 Audi S4\/S5\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eHeat shielded downpipes offer several advantages that can significantly improve your Audi's performance and longevity:\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eReduced Heat Soak\u003c\/strong\u003e\u003cspan\u003e: By effectively managing exhaust heat, \u003c\/span\u003e\u003ca href=\"https:\/\/www.heatshieldproducts.com\/blog\/tech\/why-its-important-to-insulate-and-keep-heat-in-your-exhaust-system\"\u003e\u003cspan\u003eheat shields prevent excessive temperatures from affecting nearby components\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e, reducing the risk of heat soak and maintaining optimal engine performance.\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eEnhanced Engine Bay Protection\u003c\/strong\u003e\u003cspan\u003e: \u003c\/span\u003e\u003ca href=\"https:\/\/koolwrap.com.au\/the-importance-of-heat-shields-for-vehicle-performance-and-efficiency\/\"\u003e\u003cspan\u003eHeat shields act as a barrier, protecting sensitive components\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e such as electrical systems, fuel lines, and wiring harnesses from heat-related damage.\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eImproved Air Intake Temperature\u003c\/strong\u003e\u003cspan\u003e: By keeping engine bay temperatures lower, heat shields help maintain cooler air intake temperatures, leading to better combustion and increased power output.\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eOptimized Exhaust Flow\u003c\/strong\u003e\u003cspan\u003e: Heat shielding helps maintain higher exhaust gas temperatures, which can improve exhaust flow and scavenging, potentially leading to better turbocharger performance and faster spool times.\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli aria-level=\"1\" dir=\"ltr\"\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eNoise and Vibration Reduction\u003c\/strong\u003e\u003cspan\u003e: Heat shields can also help dampen noise and vibrations, contributing to a more refined driving experience.\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFor performance enthusiasts looking to maximize their Audi's potential, the benefits of heat shielded downpipes often outweigh the negligible increase in weight and cost.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eKey safeguards include:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cstrong\u003eOptimized airflow\u003c\/strong\u003e\u003cspan\u003e that maintains safe EGTs (exhaust gas temperatures), unlike cheap aftermarket pipes causing thermal runaway.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cstrong\u003eOEM+ compatibility\u003c\/strong\u003e\u003cspan\u003e\u003cstrong\u003e with factory sensors\u003c\/strong\u003e and CAP’s O2 spacers (use code \u003c\/span\u003e\u003cspan\u003eSPACER50\u003c\/span\u003e\u003cspan\u003e) to prevent check-engine lights and fuel trim errors.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cstrong\u003eHeat-shielded options\u003c\/strong\u003e\u003cspan\u003e (available as add-ons) to protect nearby wiring and components from radiant heat.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eIs a Catless Downpipe Worth It for Your Audi 3.0T?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFor Audi 3.0T owners chasing \u003c\/span\u003e\u003cspan\u003emax power and turbo response\u003c\/span\u003e\u003cspan\u003e, CAP’s catless downpipe is the single most impactful bolt-on mod. Here’s why:\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\" dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003ccolgroup\u003e\n\u003ccol width=\"132\"\u003e\n\u003ccol width=\"237\"\u003e\n\u003ccol width=\"171\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eBenefit\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCAP Downpipe\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eStock Downpipe\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eTurbo Spool Time\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e15-25% faster boost response\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eLaggy\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eExhaust Note\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAggressive growl\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eMuffled, artificial tone\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eLongevity\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eLifetime warranty, no clogged cats\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eLimited warranty\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003ePair it with our\u003c\/span\u003e\u003ca href=\"https:\/\/canautoperformance.com\/products\/cap-3-0t-intercooler-audi-b9-b9-5-s4-s5-sq5\"\u003e\u003cspan\u003e 3.0T Intercooler\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e to unlock the full performance potential of your Audi.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eStill hesitant? Check our\u003ca href=\"https:\/\/canautoperformance.com\/blogs\/audi\/beginner-s-guide-to-modify-an-audi\"\u003e\u003cspan\u003e \u003c\/span\u003eUltimate Audi Mod Guide\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003efor dyno-backed proof why this is the enthusiast’s first mandatory upgrade.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eThis 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. Canadian 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.\u003c\/p\u003e","brand":"Can Auto Performance","offers":[{"title":"Regular","offer_id":50759134282032,"sku":"CAP-EXH-097","price":548.0,"currency_code":"USD","in_stock":true},{"title":"Heat Shield","offer_id":50759134314800,"sku":"CAP-EXH-098","price":748.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/7582\/4176\/files\/Screenshot_2026-02-12_162716.png?v=1770931648","url":"https:\/\/es-performance.com\/fr-us\/products\/cap-3-0t-catless-downpipe-for-2018-2024-b9-b9-5-audi-s4-s5","provider":"Eurosport Performance","version":"1.0","type":"link"}