{"product_id":"ie-catback-exhaust-system-for-audi-b9-b9-5-s4","title":"IE Catback Exhaust System For Audi B9\/B9.5 S4","description":"\u003cstyle\u003e\n.esp-sec{--acc:#00b38a;--ink:#f2f4f6;--mut:#9aa3ad;--line:#2a2f35;--bg:#15181c;--panel:#0b0d0f;background:var(--panel);color:var(--ink);line-height:1.55;padding:22px 26px;border-radius:12px;margin:0 0 14px;display:block;width:100%;box-sizing:border-box}\n.esp-sec *{box-sizing:border-box}\n.esp-sec h2{font-size:1.4rem;letter-spacing:.04em;text-transform:uppercase;margin:0 0 .8rem;padding-left:.75rem;border-left:5px solid var(--acc);line-height:1.15;color:#fff}\n.esp-sec p{margin:0 0 .9rem;color:#d6dadf}\n.esp-sec p:last-child{margin-bottom:0}\n.esp-sec .esp-lead{font-size:1.15rem;color:#fff}\n.esp-sec .esp-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:.4rem 0 0}\n.esp-sec .esp-card{background:var(--bg);border:1px solid var(--line);border-top:3px solid var(--acc);border-radius:10px;padding:16px 18px}\n.esp-sec .esp-card h4{margin:0 0 .35rem;font-size:.95rem;text-transform:uppercase;letter-spacing:.05em;color:var(--acc)}\n.esp-sec .esp-card p{margin:0;color:#cfd4d9;font-size:.95rem}\n.esp-sec .esp-img{width:100%;height:auto;border-radius:10px;margin:.4rem 0 0;display:block}\n.esp-sec ul.esp-feat{list-style:none;padding:0;margin:.2rem 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:8px 18px}\n.esp-sec ul.esp-feat li{padding-left:1.4rem;position:relative;color:#d6dadf;margin:0}\n.esp-sec ul.esp-feat li:before{content:\"\";position:absolute;left:0;top:.55em;width:.7rem;height:.7rem;background:var(--acc);border-radius:2px;transform:rotate(45deg)}\n.esp-sec table.esp-spec{width:100%;border-collapse:collapse;margin:.2rem 0 0;font-size:.95rem}\n.esp-sec table.esp-spec th,.esp-sec table.esp-spec td{text-align:left;padding:.6rem .7rem;border-bottom:1px solid var(--line);vertical-align:top;color:#d6dadf;background:transparent}\n.esp-sec table.esp-spec th{width:34%;background:var(--bg);font-weight:600;color:#fff}\n.esp-sec .esp-badges{display:flex;gap:10px;flex-wrap:wrap;margin:.2rem 0 .9rem}\n.esp-sec .esp-badge{display:inline-flex;flex-direction:column;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 16px;min-width:140px}\n.esp-sec .esp-badge span{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--mut)}\n.esp-sec .esp-badge strong{font-size:1.05rem;color:#fff}\n.esp-sec .esp-note{border-left:4px solid var(--acc);background:#0f1f1b;padding:.75rem 1rem;border-radius:0 8px 8px 0;margin:.9rem 0 0;color:#d6dadf}\n.esp-sec details{border:1px solid var(--line);border-radius:8px;padding:.6rem .9rem;margin:0 0 8px;background:var(--bg)}\n.esp-sec details:last-child{margin-bottom:0}\n.esp-sec details summary{cursor:pointer;font-weight:600;list-style:none;color:#fff}\n.esp-sec details summary::-webkit-details-marker{display:none}\n.esp-sec details summary:after{content:\"+\";float:right;color:var(--acc);font-weight:700}\n.esp-sec details[open] summary:after{content:\"\\2013\"}\n.esp-sec details p{margin:.6rem 0 0;color:#cfd4d9}\n.esp-sec .esp-doc{display:inline-block;margin:0 .6rem 0 0;padding:.5rem 1rem;background:var(--acc);color:#061411;border-radius:6px;text-decoration:none;font-weight:700;font-size:.92rem}\n.esp-sec .esp-doc:hover{background:#00c99b;color:#061411}\n.esp-sec .esp-note,.esp-sec .esp-doc{float:none}.esp-sec p.esp-note{display:block;clear:both;width:100%}\n.esp-sec .esp-split{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:center}\n.esp-sec .esp-split.rev{grid-template-columns:.9fr 1.1fr}\n.esp-sec .esp-split img{width:100%;height:auto;border-radius:10px;display:block}\n@media(max-width:720px){.esp-sec .esp-split,.esp-sec .esp-split.rev{grid-template-columns:1fr}}\n.esp-sec .esp-card img{width:100%;height:auto;border-radius:8px;margin:0 0 10px;display:block}\n.esp-sec .esp-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}\n.esp-sec .esp-step{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:16px 18px;position:relative}\n.esp-sec .esp-step .n{display:inline-block;width:30px;height:30px;line-height:30px;text-align:center;border-radius:50%;background:var(--acc);color:#061411;font-weight:800;margin-bottom:8px}\n.esp-sec .esp-step h4{margin:0 0 .35rem;font-size:.95rem;text-transform:uppercase;letter-spacing:.05em;color:#fff}\n.esp-sec .esp-step .tag{display:inline-block;margin-top:10px;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--acc);border:1px solid var(--acc);border-radius:4px;padding:2px 8px}\n.esp-sec table.esp-suite{width:100%;border-collapse:collapse;font-size:.92rem}\n.esp-sec table.esp-suite th,.esp-sec table.esp-suite td{padding:.5rem .6rem;border-bottom:1px solid var(--line);color:#d6dadf;text-align:center}\n.esp-sec table.esp-suite th{background:var(--bg);color:#fff;text-transform:uppercase;letter-spacing:.06em;font-size:.78rem}\n.esp-sec table.esp-suite td:first-child,.esp-sec table.esp-suite th:first-child{text-align:left}\n.esp-sec table.esp-suite td.y{color:var(--acc);font-weight:800}\n.esp-sec table.esp-suite td.n{color:#555}\n.esp-sec ul.esp-notes{margin:.2rem 0 0;padding-left:1.2rem;color:#d6dadf}\n.esp-sec ul.esp-notes li{margin:0 0 .35rem}\n.esp-sec .esp-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin:.4rem 0 0}\n.esp-sec .esp-stat{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:16px 18px;text-align:center}\n.esp-sec .esp-stat small{display:block;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}\n.esp-sec .esp-stat strong{display:block;font-size:1.5rem;color:var(--acc);margin:4px 0;line-height:1.1}\n.esp-sec ol.esp-ol{margin:.4rem 0 0;padding-left:1.3rem;color:#d6dadf}.esp-sec ol.esp-ol li{margin:0 0 .4rem}\n.esp-sec .esp-video{position:relative;padding-top:56.25%;border-radius:10px;overflow:hidden;margin:.6rem 0 0}.esp-sec .esp-video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}\n\u003c\/style\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eSay It Loudly\u003c\/h2\u003e\n\u003cp\u003eYour S4 should sound as mean as it looks and drives. Stock is too quiet and others add volume with rasp and drone. iE Catbacks bring a deep, aggressive roar under throttle, while DroneTrap™ helps keep the cabin comfortable. Give your Audi a voice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eValved Or Rowdy\u003c\/h2\u003e\n\u003cp\u003eOne amazing sound. Three ways to make it yours.\u003c\/p\u003e\n\u003cdiv class=\"esp-grid\"\u003e\n\u003cdiv class=\"esp-card\"\u003e\n\u003cimg src=\"https:\/\/performancebyie.com\/cdn\/shop\/files\/iE_B9_S4_Catback_Exhaust_Non-Valved_8967d747-e498-4250-9589-6146377c3634.webp?v=1791571166\u0026amp;width=1400\" alt=\"LOW-KEY WHEN YOU WANT IT\" loading=\"lazy\"\u003e\u003ch4\u003eLOW-KEY WHEN YOU WANT IT\u003c\/h4\u003e\n\u003cp\u003eSome drives you'd rather keep things low-key. iE valved exhaust adds stock and app-controlled valves that get loud when you want it, or close them to to keep it subdued.. it's your call.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-card\"\u003e\n\u003cimg src=\"https:\/\/performancebyie.com\/cdn\/shop\/files\/iE_B9_S4_Catback_Exhaust_With_Midpipes.webp?v=1791571266\u0026amp;width=1400\" alt=\"ALWAYS ON\" loading=\"lazy\"\u003e\u003ch4\u003eALWAYS ON\u003c\/h4\u003e\n\u003cp\u003eFor drivers who want the roar every mile, the non-valved catback delivers a deep, aggressive note. DroneTrap™ helps keep rasp and cabin drone in check.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-card\"\u003e\n\u003ch4\u003eMORE SOUND, MORE FLOW\u003c\/h4\u003e\n\u003cp\u003eTake your valved or non-valved iE Catback further with optional Midpipes. Replace two factory resonators with 12 feet of piping for an even bigger sound and improved exhaust flow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eControlled Chaos\u003c\/h2\u003e\n\u003cp\u003eDroneTrap™ is our proprietary resonator, tuned specifically for the B9 S4 V6 to target frequencies that cause annoying cabin drone, rasp, and vibrations. Keep the roar, trap everything else.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eHit The Gym\u003c\/h2\u003e\n\u003cdiv class=\"esp-split\"\u003e\n\u003cdiv\u003e\u003cp\u003eLook stronger, bigger, and meaner with over-sized quad slash-cut motorsport tips. No cutting or melted bumpers here, these aggressive tips fill the factory exhaust cutouts with a perfect high-end fit.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg src=\"https:\/\/performancebyie.com\/cdn\/shop\/files\/iE_B9_S4_Catback_Exhaust_TIps.webp?v=1791569518\u0026amp;width=1400\" alt=\"HIT THE GYM\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eHear It In Action\u003c\/h2\u003e\n\u003ca class=\"esp-video\" href=\"https:\/\/www.youtube.com\/watch?v=m3HvOUtmXxU\" target=\"_blank\" rel=\"noopener\" style=\"position:relative!important;display:block!important;width:100%!important;max-width:100%!important;height:0!important;min-height:0!important;padding:0 0 56.25% 0!important;margin:.8rem 0 0!important;border-radius:10px;overflow:hidden!important;background:#000\"\u003e\u003cimg src=\"https:\/\/img.youtube.com\/vi\/m3HvOUtmXxU\/hqdefault.jpg\" alt=\"Watch the video\" loading=\"lazy\" style=\"position:absolute!important;top:0!important;left:0!important;width:100%!important;height:100%!important;max-height:none!important;object-fit:cover!important;display:block!important;margin:0!important;opacity:.85\"\u003e\u003cspan style=\"position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:#00b38a;color:#061411;font-weight:800;padding:.6rem 1.2rem;border-radius:999px;font-size:.95rem;white-space:nowrap\"\u003e▶  Watch the video\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eMMI Or App - Your Call\u003c\/h2\u003e\n\u003cdiv class=\"esp-split rev\"\u003e\n\u003cimg src=\"https:\/\/performancebyie.com\/cdn\/shop\/files\/iE_B9_S4_Valved_Catback_Exhaust_App_Control.webp?v=1791569911\u0026amp;width=1400\" alt=\"MMI OR APP - YOUR CALL\" loading=\"lazy\"\u003e\u003cdiv\u003e\u003cp\u003eNo garage-door-style remote to dig out or lose. Control your iE Valved Catback just like stock from your MMI. iE PRO pr APEX Tune Suite users can take manual control with the POWERLink app on your phone or through CarPlay at anytime.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eBuilt Right\u003c\/h2\u003e\n\u003cdiv class=\"esp-split\"\u003e\n\u003cdiv\u003e\u003cp\u003eUnlike cheap, thin-walled systems, iE Catbacks fit precisely and are built to handle heat and vibration. T304L stainless, hand TIG welds, boxed hangers, bridged piping, reinforced stamped resonators, and lap-joint connections help keep the system tight and sealed. Drive it hard.\u003c\/p\u003e\u003c\/div\u003e\n\u003cimg src=\"https:\/\/performancebyie.com\/cdn\/shop\/files\/iE_B9_S4_Catback_Exhaust_Quality.webp?v=1791570144\u0026amp;width=1400\" alt=\"BUILT RIGHT\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eBolt It On\u003c\/h2\u003e\n\u003cdiv class=\"esp-split rev\"\u003e\n\u003cimg src=\"https:\/\/performancebyie.com\/cdn\/shop\/files\/iE_B9_S4_Catback_Exhaust.webp?v=1791570006\u0026amp;width=1400\" alt=\"BOLT IT ON\" loading=\"lazy\"\u003e\u003cdiv\u003e\u003cp\u003eYou don't need a lift or a welder. The iE Valved Catback is a true bolt-on that lines up with your factory hangers and mounts, using basic hand tools. Bolt it on in your garage then let it rip.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eTech specs\u003c\/h2\u003e\n\u003ctable class=\"esp-spec\"\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless steel T304L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResonator\u003c\/th\u003e\n\u003ctd\u003eiE DroneTrap™ B9 S4 V6T specific design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTip Design\u003c\/th\u003e\n\u003ctd\u003e90MM Single wall slash-cut Quad tips (2 per side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003ctd\u003eDual 2.5\" Piping High-flow for any power goal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eTIG welded Mandrel bent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eValve Control\u003c\/th\u003e\n\u003ctd\u003eFactory control \/ MMI or iE POWERlink App with any PRO or APEX Tune Suite Requires valved exhaust option*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHanger design\u003c\/th\u003e\n\u003ctd\u003eReinforced boxed design -\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDownpipe Compatability\u003c\/th\u003e\n\u003ctd\u003eStock or aftermarket -\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMidpipe Compatability\u003c\/th\u003e\n\u003ctd\u003eStock or iE Midpipes -\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhy choose iE B9 S4 exhaust?\u003c\/summary\u003e\u003cp\u003e+ Aggressive deep roar under throttle + DroneTrap™ smooths harsh annoyances + No highway drone or cabin fatigue + Built strong with boxed hangers + True bolt-on with no cutting or welding\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill a Catback give my Audi S4 Drone?\u003c\/summary\u003e\u003cp\u003eNot with iE. Our Catbacks use proprietary DroneTrap™ technology to target and cancel the exhaust frequencies that cause interior drone. This keeps the exhaust aggressive under throttle while remaining comfortable during steady highway cruising.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs stainless steel the best option for my B9 S4?\u003c\/summary\u003e\u003cp\u003eYes. iE Catback systems use premium 304 stainless steel for it's excellent corrosion resistance and long-term durability. Combined with reinforced boxed hangers and secure lap-joint connections, this construction keeps the exhaust strong, sealed, and reliable in any climate.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow difficult is it to install a catback exhaust on a B9 S4?\u003c\/summary\u003e\u003cp\u003eWith iE, installation is straightforward and DIY-friendly. These catbacks are a true bolt-on system that requires no cutting or welding and installs with basic hand tools using factory mounting locations. Most owners will have no trouble performing the installation in their own garage, however an auto-lift will make life much easier.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDo I need a remote for the iE valved Catback?\u003c\/summary\u003e\u003cp\u003eNo, and that's exactly what drivers asked for. Other valved systems ship a remote that works like a garage-door opener. iE valves are controlled right from the factory MMI controls or through our POWERlink app with an iE PRO Tune Suite.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-sec\"\u003e\n\u003ch2\u003eInstall\u003c\/h2\u003e\n\u003cdiv class=\"esp-badges\"\u003e\n\u003cdiv class=\"esp-badge\"\u003e\n\u003cspan\u003eDifficulty\u003c\/span\u003e\u003cstrong\u003eModerate\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-badge\"\u003e\n\u003cspan\u003eTime\u003c\/span\u003e\u003cstrong\u003eAround 3-4 hours\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esp-badge\"\u003e\n\u003cspan\u003eTools\u003c\/span\u003e\u003cstrong\u003eBasic hand tools\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0 0 14px;clear:both;display:block\"\u003eEnjoy a quick and hassle-free DIY install. Basic hand tools are all that is needed for this one.\u003c\/p\u003e\n\u003cp class=\"esp-note\" style=\"display:block;clear:both;float:none;width:100%;margin:0\"\u003e\u003cstrong\u003eFitment notes:\u003c\/strong\u003e MMI or POWERlink app exhaust valve control requires iE Catback option\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Integrated Engineering","offers":[{"title":"Default Title","offer_id":68148989919536,"sku":"IEEXCK5","price":2413.83,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/7582\/4176\/files\/IEEXCK13_02.webp?v=1792778360","url":"https:\/\/es-performance.com\/products\/ie-catback-exhaust-system-for-audi-b9-b9-5-s4","provider":"Eurosport Performance","version":"1.0","type":"link"}