{"id":820618,"date":"2026-10-18T16:55:38","date_gmt":"2026-10-18T16:55:38","guid":{"rendered":"https:\/\/tunerscapital.si\/product\/hfi-sesalni-sistem-za-audi-a4-s4-rs4-b9-a5-s5-rs5-b9-1-4-3-0-tfsi\/"},"modified":"2026-10-18T16:55:58","modified_gmt":"2026-10-18T16:55:58","slug":"hfi-sesalni-sistem-za-audi-a4-s4-rs4-b9-a5-s5-rs5-b9-1-4-3-0-tfsi","status":"publish","type":"product","link":"https:\/\/tunerscapital.eu\/en\/product\/hfi-sesalni-sistem-za-audi-a4-s4-rs4-b9-a5-s5-rs5-b9-1-4-3-0-tfsi\/","title":{"rendered":"HFI air intake system for Audi A4\/S4\/RS4 B9, A5\/S5\/RS5 B9 (1.4\u20133.0 TFSI)"},"content":{"rendered":"<p>This HF-Series intake upgrade kit for the A4 and A5 B9 model range with 1.4, 2.0, 2.9 and 3.0 TFSI engines combines an optimised air intake system in an OEM-style design with maximum performance.<\/p>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li>increased volume thanks to the upgraded upper cover<\/li>\n<li>air filter with a 90 mm trumpet connection<\/li>\n<li>OEM appearance<\/li>\n<li>developed using 3D scanning and flow simulation<\/li>\n<li>dry, reusable Pipercross air filter<\/li>\n<li>flow-optimised air path<\/li>\n<li>includes an upgraded intake pipe and turbo inlet, depending on the selected engine version<\/li>\n<li>maximum performance and capability<\/li>\n<\/ul>\n<p><strong>Note:<\/strong> Unlike inlet kits from other manufacturers, the RS versions do not require the engine cover to be cut. The kit fits without any further modifications.<\/p>\n<p>The kit was developed using extensive 3D scanning, flow simulations and testing on a test bench, race track and road. This enabled us to achieve optimum performance together with a pleasant improvement in intake sound.<\/p>\n<p>It is suitable for both standard vehicles and vehicles with tuned engines. On the 2.9 TFSI engine in the RS4\/RS5, simply fitting this intake system to the standard engine, without software or other hardware changes, produced a measured gain of <strong>+25 PS<\/strong> and <strong>+40 Nm<\/strong>. We achieved the same result on three different vehicles, demonstrating the considerable potential of this upgrade.<\/p>\n<p><strong>Suitable for:<\/strong> Audi A4 IV (B9), Audi A5 II (F5\/F53), Audi RS4 V (B9), Audi RS5 II (F5).<\/p>\n<h3>Manufacturer\u2019s vehicle data<\/h3>\n<ul>\n<li>HFI Upgrade Air Intake Audi A4\/S4\/RS4 B9, A5\/S5\/RS5 B9<\/li>\n<\/ul>\n<p><em>Original product name by HG Motorsport (\u00bbz.B.\u00ab = e.g.). Please check model, year and engine of your vehicle before ordering; if in doubt, contact us and we will check for you.<\/em><\/p>\n<h3>Approval<\/h3>\n<p>The manufacturer does not state an ECE, ABE or Teilegutachten approval for this part.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Upgraded HFI air intake system with increased airflow, a dry reusable Pipercross filter, intake pipe and turbo inlet.<\/p>\n<p><strong>Suitable for:<\/strong> Audi A4 IV (B9), Audi A5 II (F5\/F53), Audi RS4 V (B9), Audi RS5 II (F5).<\/p>\n","protected":false},"featured_media":820623,"comment_status":"open","ping_status":"closed","template":"","meta":{"ep_exclude_from_search":false},"product_brand":[146199],"product_cat":[44810],"product_tag":[],"class_list":["post-820618","product","type-product","status-publish","has-post-thumbnail","tc_lang-en","tc_lang-hr","product_brand-hg-motorsport","product_cat-cold-air-intake-sistemi","product_shipping_class-dostava-teza-do-5kg","pa_proizvajalec-hg-motorsport","first","onbackorder","taxable","shipping-taxable","purchasable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product\/820618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/comments?post=820618"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/media\/820623"}],"wp:attachment":[{"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/media?parent=820618"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product_brand?post=820618"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product_cat?post=820618"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product_tag?post=820618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}