{"product_id":"tgk-motorsport-audi-2-9t-air-intake-system-b9-rs4-rs5","title":"TGK Motorsport Audi 2.9T Air Intake System - B9 RS4\/RS5","description":"\u003cdiv class=\"tgk\"\u003e\n\u003cdiv class=\"tgk-section\"\u003e\n\u003cdiv class=\"tgk-sh\"\u003e\n\u003cdiv class=\"tgk-ic\"\u003e\u003csvg viewbox=\"0 0 24 24\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M7 2h2v2h6V2h2v2h1a2 2 0 012 2v1h-2v1h2v4h-2v1h2v1a2 2 0 01-2 2h-1v2h-6v2H9v-2H7v2H5v-2H4a2 2 0 01-2-2v-1h2v-1H2V9h2V8H2V7a2 2 0 012-2h1V3h2V2zm1 4a1 1 0 00-1 1v8a1 1 0 001 1h8a1 1 0 001-1V7a1 1 0 00-1-1H8zm2 2h4v6h-4V8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"tgk-sh-title\"\u003eOverview\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"tgk-p\"\u003eThe factory air intake on the 2019–2026 Audi RS4 and RS5 B9 2.9T biturbo is a textbook case of cost-driven engineering. Audi's OEM plastic airbox and restrictive turbo inlet diameter choke airflow well before your turbos ever reach their potential — a hard ceiling on power, throttle response, and turbo spool that becomes even more punishing once tuning, hybrid turbos, or supporting modifications enter the picture. The inlet diameter is undersized for the flow demands of the EA839 2.9T, and the soft rubber couplers and thin-walled plastic construction add heat soak and unwanted compliance under boost.\u003c\/p\u003e\n\u003cp class=\"tgk-p\"\u003eThe TGK Motorsport Audi RS4 \/ RS5 B9 2.9T Air Intake System eliminates every one of those restrictions. Built around a true 5\" inlet snout and matched 5\" high-flow air filter, the system feeds each turbo with a dramatically larger, more direct path from filter to compressor wheel. CFD-validated flow geometry, 6061-T6 machined turbo flanges, and a cast aluminum inlet section replace every piece of OEM plastic — delivering measurable improvements in airflow volume, inlet temperature, and compressor efficiency whether you're running stock turbos or a full hybrid setup.\u003c\/p\u003e\n\u003cfigure class=\"tgk-gif\" data-gif-url=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0579\/6259\/4453\/files\/rs5_intake.gif?v=1792096193\" style=\"margin: 18px 0px; text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0579\/6259\/4453\/files\/rs5_intake.gif?v=1792096193\" alt=\"Product animation\" loading=\"lazy\" style=\"display: block; max-width: 100%; height: auto; margin: 0px auto; border-radius: 6px;\"\u003e\u003c\/figure\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-section\"\u003e\n\u003cdiv class=\"tgk-sh\"\u003e\n\u003cdiv class=\"tgk-ic\"\u003e\u003csvg viewbox=\"0 0 24 24\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M3 3h18v2H3V3zm0 4h12v2H3V7zm0 4h18v2H3v-2zm0 4h12v2H3v-2zm0 4h18v2H3v-2z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"tgk-sh-title\"\u003eSpecifications\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable class=\"tgk-specs\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003eTGK-0301-09\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible vehicles\u003c\/td\u003e\n\u003ctd\u003e2019–2026 Audi RS4 B9 2.9T \/ 2019–2026 Audi RS5 B9 2.9T (EA839 engine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e6061-T6 machined aluminum turbo flanges; cast aluminum inlet section\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet diameter\u003c\/td\u003e\n\u003ctd\u003eTrue 5\" inlet snout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter diameter\u003c\/td\u003e\n\u003ctd\u003e5\" high-flow air filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurbo compatibility\u003c\/td\u003e\n\u003ctd\u003eStock turbos and all hybrid turbo setups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardware included\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLifetime structural warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-section\"\u003e\n\u003cdiv class=\"tgk-sh\"\u003e\n\u003cdiv class=\"tgk-ic\"\u003e\u003csvg viewbox=\"0 0 24 24\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M13 2L3 14h9l-1 8 10-12h-9l1-8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"tgk-sh-title\"\u003eFeatures \u0026amp; Benefits\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-feats\"\u003e\n\u003cdiv class=\"tgk-feat\"\u003e\n\u003cdiv class=\"tgk-feat-chk\"\u003e✓\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat-txt\"\u003e\n\u003cb\u003eTrue 5\" Inlet Snout\u003c\/b\u003eA genuine 5\" inlet diameter — not nominal, not approximate — delivers the cross-sectional area the 2.9T biturbo's EA839 compressors demand at elevated flow rates, eliminating the velocity stack effect caused by the OEM undersized inlet.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat\"\u003e\n\u003cdiv class=\"tgk-feat-chk\"\u003e✓\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat-txt\"\u003e\n\u003cb\u003e6061-T6 Machined Flanges\u003c\/b\u003eTurbo flanges are CNC-machined from 6061-T6 billet aluminum to exacting tolerances, ensuring airtight compressor inlet sealing, zero flex under boost pressure, and a precision interface that soft OEM rubber simply cannot replicate.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat\"\u003e\n\u003cdiv class=\"tgk-feat-chk\"\u003e✓\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat-txt\"\u003e\n\u003cb\u003eCast Aluminum Inlet\u003c\/b\u003eThe cast aluminum inlet section provides structural rigidity and thermal stability in the tight B9 engine bay, resisting heat soak and deformation under sustained high-load driving — keeping intake air temperatures consistent lap after lap.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat\"\u003e\n\u003cdiv class=\"tgk-feat-chk\"\u003e✓\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat-txt\"\u003e\n\u003cb\u003e5\" High-Flow Filter\u003c\/b\u003eThe oversized 5\" air filter matches the inlet snout diameter so filtration never becomes the restriction — maximizing dust capacity and service intervals while maintaining the unrestricted flow your turbos need to perform at peak efficiency.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat\"\u003e\n\u003cdiv class=\"tgk-feat-chk\"\u003e✓\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat-txt\"\u003e\n\u003cb\u003eCFD-Validated Flow Path\u003c\/b\u003eEvery internal radius, transition, and taper in this intake was developed and refined using computational fluid dynamics analysis — ensuring that airflow enters each turbo with minimal turbulence, pressure drop, and velocity loss across the entire RPM range.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat\"\u003e\n\u003cdiv class=\"tgk-feat-chk\"\u003e✓\u003c\/div\u003e\n\u003cdiv class=\"tgk-feat-txt\"\u003e\n\u003cb\u003eStock \u0026amp; Hybrid Compatible\u003c\/b\u003eThe system is engineered to work seamlessly with factory RS4 and RS5 turbos as well as all current hybrid turbo configurations — making it the last intake you'll need to buy as your build evolves, with no adapter plates or revised fitment required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-section\"\u003e\n\u003cdiv class=\"tgk-sh\"\u003e\n\u003cdiv class=\"tgk-ic\"\u003e\u003csvg viewbox=\"0 0 24 24\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M22.7 19l-9.1-9.1c.9-2.3.4-5-1.5-6.9-2-2-5-2.4-7.4-1.3L9 6 6 9 1.6 4.7C.4 7.1.9 10.1 2.9 12.1c1.9 1.9 4.6 2.4 6.9 1.5l9.1 9.1c.4.4 1 .4 1.4 0l2.3-2.3c.5-.4.5-1.1.1-1.4z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"tgk-sh-title\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-item\"\u003e\n\u003cdiv class=\"tgk-faq-q\"\u003eWill this intake work with my hybrid turbos on my B9 RS4 or RS5?\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-a\"\u003eYes. The TGK Motorsport 2.9T intake is designed to be compatible with all stock turbo configurations as well as the full range of hybrid turbo setups currently available for the B9 RS4 and RS5. The 5\" inlet diameter and machined turbo flanges provide the clearance and sealing surface required for larger hybrid compressor inlets without any modification or adapter hardware.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-item\"\u003e\n\u003cdiv class=\"tgk-faq-q\"\u003eDo I need a tune after installing this intake on my 2.9T Audi?\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-a\"\u003eA tune is not required for the intake to function, but we strongly recommend pairing any significant intake upgrade with a proper ECU calibration to take full advantage of the increased airflow. Your existing tune will still run safely, but a recalibrated map optimized for the new intake airflow data will maximize the power and response gains available.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-item\"\u003e\n\u003cdiv class=\"tgk-faq-q\"\u003eHow does the 5\" inlet diameter compare to other intakes on the market for the B9 RS4 \/ RS5?\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-a\"\u003eMost competing intakes for the B9 2.9T use nominal or tapered inlet diameters that measure smaller at the critical compressor flange interface. The TGK system delivers a true 5\" inner diameter at the snout, providing a larger effective flow area than intakes advertised at similar sizing by other brands.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-item\"\u003e\n\u003cdiv class=\"tgk-faq-q\"\u003eWhat is included with the TGK Motorsport B9 RS4 \/ RS5 intake kit?\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-a\"\u003eThe kit ships complete with the cast aluminum inlet section, both 6061-T6 machined turbo flanges, a 5\" high-flow air filter, and all required hardware for installation. No additional purchases are needed to complete the installation on a stock or hybrid-turbo B9 RS4 or RS5.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-item\"\u003e\n\u003cdiv class=\"tgk-faq-q\"\u003eWhat does the lifetime structural warranty cover?\u003c\/div\u003e\n\u003cdiv class=\"tgk-faq-a\"\u003eTGK Motorsport's lifetime structural warranty covers the cast aluminum inlet section and machined turbo flanges against defects in materials and workmanship for the life of the part. This covers cracking, porosity failures, and machining defects — giving RS4 and RS5 owners long-term confidence in a component that lives in a high-heat, high-vibration environment.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"TGK Motorsport","offers":[{"title":"Default Title","offer_id":49990404341909,"sku":"TGK-0301-09","price":699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0579\/6259\/4453\/files\/Main_Full_Kit.jpg?v=1792008458","url":"https:\/\/tgkmotorsport.com\/products\/tgk-motorsport-audi-2-9t-air-intake-system-b9-rs4-rs5","provider":"TGK Motorsport","version":"1.0","type":"link"}