{"product_id":"eventuri-audi-b9-rs5rs4-black-carbon-intake-with-secondary-duct","title":"Eventuri Audi B9 RS5\/RS4 Black Carbon intake with secondary duct","description":"\u003cp\u003eThe Audi B9 RS4\/RS5 Eventuri intake was developed to give less restrictive airflow to the turbo whilst maintaining low inlet temperatures. The RS5\/RS4 engine bay becomes heat soaked very quickly so simply having an open cone system would result in better airflow but with higher inlet temperatures. We therefore completely re-engineered the inlet track from the turbo inlet pipe to the front grill with a highly efficient sealed system. The restrictive stock airbox and flexible plastic inlet pipe have been replaced with a Venturi filter housing and a duct system with smooth transitions. Furthermore, by removing the convoluted stock inlet pipe and replacing it with our one-piece Venturi housing and solid tube, the airflow is much smoother as it enters the turbo inlet tube. The resulting performance gains and aesthetics are industry leading for this platform.\u003c\/p\u003e\n\u003ch2\u003eThe Eventuri Difference\u003c\/h2\u003e\n\u003cp\u003eThe B9 RS4\/RS5 Eventuri system uses our Patent Pending Carbon fibre Housings with our bespoke Gen-2 filter which provide an aerodynamically efficient airflow path from the filter to the inlet tubes. Not just another cone filter with a heat shield but a unique design which invokes the Venturi effect. You can read more about the housing design and how it works \u003ca href=\"https:\/\/www.eventuri.net\/technology\/\"\u003eHERE\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003ePerformance\u003c\/h2\u003e\n\u003cp\u003eBelow is an independent dyno graph showing the comparison between the Eventuri and the stock airbox on a B9 RS5. The car had no other modifications. As you can see, power and torque are increased through a large portion of the rpm range. This translates on the road to increased part throttle and full throttle response with the car pulling much more eagerly to the redline. The testing was done on the same day back-to-back and temperatures were monitored to ensure consistency. The bonnet was closed for all runs.\u003c\/p\u003e\n\u003cp\u003eThe gains are from a combination of reasons:\u003c\/p\u003e\n\u003cp\u003e1) The sealed system keeps IATs low – especially with the front air scoop which forces air into the system.\u003c\/p\u003e\n\u003cp\u003e2) The Venturi housing provides a smooth transition from the filter to the intake tube with no convoluted rubber section. This helps the turbo to run more efficiently by maintaining laminar flow in the inlet track.\u003c\/p\u003e\n\u003cp\u003e3) The entire system is constructed from pure pre-preg carbon fibre which is great at insulating from heat.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/www.eventuri.net\/wp-content\/uploads\/2025\/10\/45376837145_dc073f483f_b.webp\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEVE-B9RS5-CF-INT :\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAudi B9 RS5\/RS4 Black Carbon intake with secondary duct\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEach intake system consists of:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCarbon Fiber Venturi housing with intergated tube\u003c\/li\u003e\n\u003cli\u003eHigh Flow Generation 2 Filter\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Intake Duct\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Front Scoop\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Secondary Duct\u003c\/li\u003e\n\u003cli\u003eHigh Quality Silicon Couplers and OEM Spec Hose Clamps\u003c\/li\u003e\n\u003cli\u003eLaser Cut Stainless Steel Bracket Work\u003c\/li\u003e\n\u003cli\u003eCNC Machined Mounting Stubs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.eventuri.net\/wp-content\/uploads\/2025\/10\/45480792364_cf7468cc9b_b.webp\"\u003e\u003c\/p\u003e\n\u003ch2\u003eCarbon Intake Housing Assembly\u003c\/h2\u003e\n\u003cp\u003eThe filter housing comprises of our bespoke generation 2 filter, the carbon pod and integrated tube. The carbon pod shrouds the reverse mounted filter and smoothly shapes the airflow down to the turbo tube which it matches in diameter to the turbo tube. This is a key feature of the intake design where we have removed the requirement for a convoluted rubber hose between the intake and the engine. The filter housing and integrated tube extends all the way to the stock turbo tube and by mounting this to the engine, the entire filter housing moves with the engine. As the engine and filter housing moves under acceleration, it is able to maintain a seal to the duct through the use of an expanding rubber extrusion which is mounted to the face of the duct (see below).\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.eventuri.net\/wp-content\/uploads\/2025\/10\/44265245630_f8acd9083d_c.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.eventuri.net\/wp-content\/uploads\/2025\/10\/42539180060_2b88ca8a3b_b.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis image shows the filter housing and duct assembled as they would be in the engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.eventuri.net\/wp-content\/uploads\/2025\/10\/43427886895_5bc3fca5e4_b.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe smooth reduction in cross sectional area invokes the Venturi effect where the airflow accelerates whilst maintaining laminar conditions. It can be thought of as a large velocity stack – below is a diagram to show the comparison between our patent pending design and a regular intake system. Our bespoke filters aid the airflow moving through the housings and allow for an even velocity profile as the airflow exits the housings. Further details can be read in the Technology and Filters pages.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/www.eventuri.net\/wp-content\/uploads\/2025\/11\/31975515988_d7679dbff3_b-1.webp\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003cdiv class=\"et_pb_toggle_content clearfix\"\u003e\n\u003cdiv class=\"et_pb_row et_pb_row_24_tb_body\"\u003e\n\u003cdiv class=\"et_pb_column et_pb_column_4_4 et_pb_column_41_tb_body  et_pb_css_mix_blend_mode_passthrough et-last-child\"\u003e\n\u003cdiv class=\"et_pb_module et_pb_de_mach_repeater et_pb_de_mach_repeater_5_tb_body\"\u003e\n\u003cdiv class=\"et_pb_module_inner\"\u003e\n\u003cdiv class=\"et_pb_de_mach_archive_loop et_pb_gutters\"\u003e\n\u003cdiv class=\"dmach-grid-sizes et_pb_de_mach_archive_loop repeater-cont grid col-desk-1 col-tab-1 col-mob-1\"\u003e\n\u003cdiv class=\"grid-posts\"\u003e\n\u003cdiv class=\"dmach-grid-item\"\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_row et_pb_row_25_tb_body product-accordion-row\"\u003e\n\u003cdiv class=\"et_pb_column et_pb_column_1_2 et_pb_column_43_tb_body  et_pb_css_mix_blend_mode_passthrough et-last-child\"\u003e\n\u003cdiv class=\"et_pb_module et_pb_de_mach_acf_item et_pb_de_mach_acf_item_39_tb_body product-accord-content et_pb_de_mach_alignment_ dmach-acf-has-value dmach-image-icon-placement-left\"\u003e\n\u003cdiv class=\"et_pb_module_inner\"\u003e\n\u003cdiv class=\"dmach-acf-item-container\"\u003e\n\u003cdiv class=\"dmach-acf-item-content\"\u003e\n\u003cp\u003ePlease download the installation guide here.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.eventuri.net\/wp-content\/uploads\/2025\/10\/Audi-B9-RS4-RS5-Installation-Guide-Compressed-1.pdf\"\u003eAudi-B9-RS4-RS5-Installation-Guide-Compressed\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Eventuri","offers":[{"title":"Default Title","offer_id":53649527570773,"sku":"EVE-B9RS5-CF-INT","price":1650.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/3327\/0357\/files\/download_4ca76c5d-8848-4845-8c4a-6ee470f8ac08.webp?v=1775725525","url":"https:\/\/shop.regalautosport.com\/products\/eventuri-audi-b9-rs5rs4-black-carbon-intake-with-secondary-duct","provider":"Regal Autosport","version":"1.0","type":"link"}