{"title":"B9 S4\/S5\/RS Exhaust","description":"","products":[{"product_id":"ie-performance-downpipe-for-audi-b9-s4-s5-3-0t","title":"IE Performance Downpipe For Audi B9 S4 \u0026 S5 3.0T","description":"\u003cp\u003e\u003cstrong\u003eMOTORSPORT SOUND\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIE's unique thick-wall investment castings produce an aggressive, drone-free exhaust note without the \"tinny\" sound typical on most full stainless body aftermarket options. Enjoy not only a louder exhaust but one with improved engine and turbo notes that will deliver miles of smiles.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePERFECT FIT\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe B9 3.0T hot-v style engine has a unique center-mounted turbo with a large downpipe that quickly splits into twin-sided exhaust sections. This challenging configuration requires exacting alignment to avoid install hassles, rattling, rubbing, and exhaust leaks. IE engineers utilize advanced 3D scanning technology and rapid prototyping to guarantee a flow-maximized design that exceeds even the factory fitment.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e200 CPSI CATALYTIC CONVERTER\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIE's downpipe includes a high-flow 200 CPSI catalytic converter. This performance CAT allows for full and unrestricted power from Stage 2 ECU tunes and hybrid turbo upgrades while reducing emissions output and eliminating unwanted smells and bumper stains found on cat-less designs.\u003c\/p\u003e\n\u003cp\u003eCatalytic converter warranty is only available for cusotmers running IE performance ECU software.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHYBRID TURBO READY\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe stock downpipe becomes a significant restriction when upgrading to a larger hybrid turbo. IE's cast downpipe is a direct-fit to available upgraded turbochargers on the market and will allow total horsepower, torque, and spool potential from your turbocharger investment.\u003c\/p\u003e\n\u003cp\u003eIE's B9 S4 \u0026amp; S5 intake system, turbo inlet pipe, and downpipe are hybrid optimized, making the installation of popular turbo upgrades an easy bolt-in process.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDYNO TESTING\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReal-world power numbers are achieved using our in-house dyno cells to verify the efficiency of the downpipe design. Dyno testing performed in controlled conditions on a hybrid turbo equipped B9 S4 resulted in consistent and significant power gains of 45HP \u0026amp; 41FT-LBS to the wheels!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRequired to support hybrid turbo ECU calibrations\u003c\/li\u003e\n\u003cli\u003eHigh-flow design to support full-bolt on stage 2 power capabilities\u003c\/li\u003e\n\u003cli\u003eRemoves any downpipe restrictions for full available power\u003c\/li\u003e\n\u003cli\u003eIncreases exhaust sound with improved engine \u0026amp; turbo notes\u003c\/li\u003e\n\u003cli\u003eImproves turbocharger efficiency \u0026amp; speeds up turbo spool\u003c\/li\u003e\n\u003cli\u003eThick-wall casting reduces radiant heat in the engine bay\u003c\/li\u003e\n\u003cli\u003e200 CPSI performance high-flow catalytic converter\u003c\/li\u003e\n\u003cli\u003e304 investment cast downpipe body\u003c\/li\u003e\n\u003cli\u003e304 stainless steel downpipe legs \u0026amp; CAT\u003c\/li\u003e\n\u003cli\u003eMassive 6\" downpipe body to dual 2.5\" downpipe legs\u003c\/li\u003e\n\u003cli\u003eHand TIG-welded for superior reliability and surface finish\u003c\/li\u003e\n\u003cli\u003eDirect bolt-in factory replacement\u003c\/li\u003e\n\u003cli\u003eCNC machined v-band and bolt flanges for leak-free operation\u003c\/li\u003e\n\u003cli\u003eInstalls to the stock exhaust or IE Midpipes upgrade\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Integrated Engineering","offers":[{"title":"Default Title","offer_id":45039689466055,"sku":"IEEXCK3","price":1099.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0088\/3969\/2384\/files\/IEEXCK3-1.jpg?v=1745042091"},{"product_id":"gas-b9-b9-5-rs4-rs5-ea839-2-9t-downpipe-set","title":"GAS B9\/B9.5 RS4\/RS5 EA839 2.9T Downpipe Set","description":"\u003cp\u003e\u003cstrong\u003eThe perfect blend of performance \u0026amp; sound for your RS4\/RS5!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf you're ready to go Stage 2 or just looking for a more aggressive sound from your 2.9T RS4\/RS5, look no further.\u003c\/p\u003e\n\u003cp\u003eOur 3.5\" stainless downpipes are hand-built here in Canada to our exacting standards, ensuring maximum performance and sound with all the reliability you've come to expect from GAS. Both versions feature CFD-optimized transitions, full stainless construction and perfect OEM fitment with both stock and aftermarket exhaust systems!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4.5\" turbo outlets tapering to a smooth 3.5\" diameter all the way to the midpipes for maximum turbo response, faster spool and lower EGTs\u003c\/li\u003e\n\u003cli\u003eFull 304 stainless construction, TIG welded \u0026amp; back-purged for longevity\u003c\/li\u003e\n\u003cli\u003eHand crafted in Canada, not overseas\u003c\/li\u003e\n\u003cli\u003eBillet flanges ensure a precise fit every time with no leaks\u003c\/li\u003e\n\u003cli\u003eEPA compliant high-flow cats rated up to 1700bhp\u003c\/li\u003e\n\u003cli\u003eGAS lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eProper tuning is recommended for both options. 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