{"id":803613,"date":"2026-10-14T10:24:50","date_gmt":"2026-10-14T10:24:50","guid":{"rendered":"https:\/\/tunerscapital.si\/product\/cts-turbo-test-pipe-za-audi-s4-s5-b9-3-0t\/"},"modified":"2026-10-14T10:24:50","modified_gmt":"2026-10-14T10:24:50","slug":"cts-turbo-test-pipe-za-audi-s4-s5-b9-3-0t","status":"publish","type":"product","link":"https:\/\/tunerscapital.eu\/en\/product\/cts-turbo-test-pipe-za-audi-s4-s5-b9-3-0t\/","title":{"rendered":"CTS Turbo test pipe for Audi S4\/S5 B9 3.0T"},"content":{"rendered":"<p>The CTS Turbo test pipe for the B9 S4\/S5 3.0T (EA839) is designed to improve exhaust gas flow and unlock greater performance potential. It replaces the restrictive factory catalytic converter, allowing the engine to flow exhaust gases more freely.<\/p>\n<p>The product was developed using modern CAD technology, ensuring a precise fit in the factory catalytic converter position. It is made from T304 stainless steel, TIG-welded by hand and back-purged with inert gas for long-term reliability.<\/p>\n<p>As well as improving performance, the test pipe produces a more pronounced sporty sound. With the factory exhaust system, it creates a sporty, deep rumble and more pronounced pops on downshifts. On upshifts, the sound is more pronounced, especially when quickly changing through all 8 gears. With an aftermarket exhaust system, the sound will be even louder.<\/p>\n<h3>Product details<\/h3>\n<ul>\n<li>Developed and tested on an actual vehicle in real-world conditions<\/li>\n<li>Made from T304 stainless steel, TIG-welded and back-purged with inert gas<\/li>\n<li>Replaces the restrictive factory catalytic converter<\/li>\n<li>Mounting hardware included<\/li>\n<li>Performance improvement without compromising exhaust gas flow<\/li>\n<li>Pronounced sporty sound that remains moderate during relaxed driving<\/li>\n<li>Does not cause intrusive cabin drone with the factory exhaust<\/li>\n<li>Gloss-polished finish for an attractive appearance<\/li>\n<\/ul>\n<p>After removing the catalytic converter, the check engine light (CEL) will illuminate. An appropriate software adjustment to the engine electronics is required to eliminate it. The use of a Stage 2 software upgrade is strongly recommended. CEL error eliminators and lambda sensor spacers are not effective on B9 S4\/S5 models.<\/p>\n<p><strong>Not road-legal in the EU.<\/strong><\/p>\n<p><strong>Suitable for:<\/strong> Audi S4 VIII (B9), Audi S5 II (B9).<\/p>\n<h3>Approval<\/h3>\n<p>This part has no T\u00dcV certification (ABE, TTG or Teilegutachten).<\/p>\n<h3>Compatible vehicles (manufacturer data)<\/h3>\n<table class=\"tc-fitment-table\">\n<thead>\n<tr>\n<th>Vehicle<\/th>\n<th>Chassis<\/th>\n<th>Years<\/th>\n<th>Engine<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Audi S4<\/td>\n<td>\u2014<\/td>\n<td>2018\u20132021<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>Audi S5<\/td>\n<td>\u2014<\/td>\n<td>2018\u20132021<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>Before ordering, check that the product matches your vehicle (model, year and engine). If in doubt, write to us \u2014 we will check for you.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Test pipe for the Audi S4\/S5 B9 with the 3.0T EA839 engine replaces the factory catalytic converter and improves exhaust gas flow and sound.<\/p>\n<p><strong>Fits:<\/strong> Audi S4 B9, Audi S5 B9<\/p>\n","protected":false},"featured_media":803614,"comment_status":"open","ping_status":"closed","template":"","meta":{"ep_exclude_from_search":false},"product_brand":[146168],"product_cat":[2070],"product_tag":[],"class_list":["post-803613","product","type-product","status-publish","has-post-thumbnail","tc_lang-en","tc_lang-hr","product_brand-cts-turbo","product_cat-izpuhi","product_shipping_class-dostava-teza-do-10kg","pa_proizvajalec-cts-turbo","first","onbackorder","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product\/803613","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=803613"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/media\/803614"}],"wp:attachment":[{"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/media?parent=803613"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product_brand?post=803613"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product_cat?post=803613"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/tunerscapital.eu\/en\/wp-json\/wp\/v2\/product_tag?post=803613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}