{"product_id":"kyostar-valved-sport-catback-exhaust-system-for-2019-2023-audi-c8-rs6-avant-rs7-sportback-ea825-4-0t-v8","title":"KYOSTAR Valved Sport Catback Exhaust System for 2019-2023 Audi C8 RS6 Avant RS7 Sportback EA825 4.0T V8","description":"\n\u003cdiv class=\"product-description\"\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eKYOSTAR Valved Sport Catback Exhaust System for 2019-2023 Audi C8 RS6 Avant RS7 Sportback EA825 4.0T V8\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\nGive your Audi RS6 Avant or RS7 Sportback a more distinctive exhaust character with the KYOSTAR Valved Sport Catback Exhaust System. Listed for compatible 2019-2023 Audi C8 RS6 and RS7 applications equipped with the EA825 4.0L twin-turbocharged V8 engine, this aftermarket exhaust system combines a sport-oriented pipe layout with a valved rear exhaust configuration.\n\u003c\/p\u003e\n\n\u003cp\u003e\nDesigned for Audi RS enthusiasts who want to personalize their vehicle's exhaust setup, the KYOSTAR system features shaped metal exhaust piping, a branching exhaust layout, and rear exhaust components as shown in the supplied product image.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe valved configuration introduces an exhaust valve mechanism that may change the available exhaust flow path depending on its operating position. The exact valve control method, factory actuator compatibility, and included electronic accessories should be confirmed before purchase.\n\u003c\/p\u003e\n\n\u003cp\u003e\nWhether you're upgrading a compatible Audi RS6 Avant or RS7 Sportback, this performance-inspired exhaust system offers an aftermarket alternative to selected factory exhaust components.\n\u003c\/p\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cul\u003e\n\u003cli\u003eValved sport catback exhaust system for compatible Audi C8 RS6 and RS7 applications.\u003c\/li\u003e\n\u003cli\u003eListed for 2019-2023 Audi C8 RS6 Avant models.\u003c\/li\u003e\n\u003cli\u003eListed for 2019-2023 Audi C8 RS7 Sportback models.\u003c\/li\u003e\n\u003cli\u003eDesigned around the Audi EA825 4.0L twin-turbocharged V8 engine platform.\u003c\/li\u003e\n\u003cli\u003eValved rear exhaust configuration.\u003c\/li\u003e\n\u003cli\u003eSport-oriented aftermarket exhaust pipe layout.\u003c\/li\u003e\n\u003cli\u003eShaped metal exhaust piping visible in the product image.\u003c\/li\u003e\n\u003cli\u003eBranching exhaust pipe design as shown in the supplied image.\u003c\/li\u003e\n\u003cli\u003eDual-side rear exhaust outlet arrangement.\u003c\/li\u003e\n\u003cli\u003eSilver-colored metal exhaust appearance.\u003c\/li\u003e\n\u003cli\u003eAftermarket alternative to compatible factory exhaust components.\u003c\/li\u003e\n\u003cli\u003eDesigned for owners seeking a different exhaust tone and character.\u003c\/li\u003e\n\u003cli\u003eCatback-style exhaust system as identified in the source product title.\u003c\/li\u003e\n\u003cli\u003eVehicle-specific application for the listed Audi RS performance models.\u003c\/li\u003e\n\u003cli\u003eProfessional installation and valve-system verification recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eFitment\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\u003cstrong\u003eAudi RS6 Avant:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2019-2023 Audi RS6 Avant (C8) — EA825 4.0L Twin-Turbo V8, source-listed fitment range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAudi RS7 Sportback:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2019-2023 Audi RS7 Sportback (C8) — EA825 4.0L Twin-Turbo V8, source-listed fitment range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVehicle Make:\u003c\/strong\u003e Audi\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Models:\u003c\/strong\u003e RS6 Avant \/ RS7 Sportback\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlatform:\u003c\/strong\u003e C8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine:\u003c\/strong\u003e EA825 4.0L Twin-Turbocharged V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSource-Listed Model Years:\u003c\/strong\u003e 2019-2023\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExhaust Type:\u003c\/strong\u003e Valved Sport Catback Exhaust\u003c\/p\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eImportant Fitment Note\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\nPlease verify your Audi model, production year, C8 platform, EA825 engine configuration, factory exhaust layout, and valve system before ordering.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe supplied product information lists 2019-2023 Audi C8 RS6 Avant and RS7 Sportback applications. This is a source-listed range and does not establish that both vehicles were available in every listed model year or market.\n\u003c\/p\u003e\n\n\u003cp\u003e\nCompatibility should be determined by the exact vehicle configuration rather than model year alone.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe supplied information does not independently confirm that the same exhaust assembly fits both the RS6 Avant and RS7 Sportback without vehicle-specific mounting differences or additional components.\n\u003c\/p\u003e\n\n\u003cp\u003e\nCompatibility with Audi C7\/C7.5 RS6, C7\/C7.5 RS7, standard A6\/A7, S6\/S7, RS Q8, or other Audi platforms is not confirmed.\n\u003c\/p\u003e\n\n\u003cp\u003e\nVehicles equipped with aftermarket downpipes, modified exhaust systems, non-factory exhaust valves, or other exhaust modifications may require additional fitment verification.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBefore ordering, compare the factory exhaust layout with the product images and verify pipe connections, exhaust hanger positions, underbody clearance, rear bumper outlet alignment, and valve control requirements.\n\u003c\/p\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eFitment Note\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\nThe KYOSTAR Valved Sport Catback Exhaust System is intended for compatible Audi C8 RS6 Avant and RS7 Sportback applications equipped with the EA825 4.0L twin-turbocharged V8 engine.\n\u003c\/p\u003e\n\n\u003cp\u003e\nA catback exhaust generally refers to exhaust components installed downstream of the catalytic converter section. The exact included pipe sections should be verified against the complete product package.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe supplied product image shows formed metal exhaust piping, a branching exhaust layout, and rear exhaust components.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis product is identified as valved. The exact valve actuator type, electronic control method, remote controller inclusion, and compatibility with factory exhaust controls are not specified.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe supplied specifications do not confirm the exhaust pipe diameter, material grade, wall thickness, exhaust tip dimensions, system weight, measured sound levels, or verified horsepower and torque gains.\n\u003c\/p\u003e\n\n\u003cp\u003e\nAn aftermarket exhaust system may change exhaust tone, volume, and driving characteristics compared with the factory configuration. Actual results depend on the vehicle, exhaust components, valve operation, and other modifications.\n\u003c\/p\u003e\n\n\u003cp\u003e\nNo specific numerical performance improvement is claimed without supporting vehicle-specific test data.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eProfessional installation is recommended.\u003c\/strong\u003e Verify the exact vehicle application, exhaust connections, and valve control configuration before ordering.\n\u003c\/p\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eProduct Details \u0026amp; Technical Specifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;\" border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eKYOSTAR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eNA-CB-5108-SS-MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eValved Sport Catback Exhaust System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Category\u003c\/td\u003e\n\u003ctd\u003ePerformance Exhaust Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Make\u003c\/td\u003e\n\u003ctd\u003eAudi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Models\u003c\/td\u003e\n\u003ctd\u003eRS6 Avant \/ RS7 Sportback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform\u003c\/td\u003e\n\u003ctd\u003eC8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSource-Listed Model Years\u003c\/td\u003e\n\u003ctd\u003e2019-2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine\u003c\/td\u003e\n\u003ctd\u003eEA825 4.0L Twin-Turbocharged V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Type\u003c\/td\u003e\n\u003ctd\u003eSport Catback Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Configuration\u003c\/td\u003e\n\u003ctd\u003eValved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Control Method\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFactory Valve Actuator Compatibility\u003c\/td\u003e\n\u003ctd\u003eNot Confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial Grade\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eSilver-Colored Metal Appearance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePipe Diameter\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Exhaust Layout\u003c\/td\u003e\n\u003ctd\u003eDual-Side Outlets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Tip Dimensions\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Weight\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSound Level\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Includes\u003c\/td\u003e\n\u003ctd\u003eExhaust Components as Shown; Complete Hardware and Valve Accessories to Be Confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eProfessional Installation Recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eWhy Upgrade Your Factory Exhaust?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\nThe factory Audi RS6 and RS7 exhaust systems are engineered to balance exhaust sound, everyday driving comfort, and vehicle refinement.\n\u003c\/p\u003e\n\n\u003cp\u003e\nAn aftermarket valved exhaust provides an alternative exhaust configuration for drivers who want to personalize the sound and appearance of their Audi RS performance vehicle.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe KYOSTAR Valved Sport Catback Exhaust combines a sport exhaust layout with a valved rear section for compatible Audi C8 RS6 and RS7 applications.\n\u003c\/p\u003e\n\n\u003cp\u003e\nActual exhaust tone and driving characteristics depend on the complete exhaust configuration, valve operation, and installed modifications. No specific decibel level, horsepower increase, or torque gain is claimed without supporting test data.\n\u003c\/p\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eFAQ\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What Audi models does this exhaust system fit?\u003c\/strong\u003e\u003cbr\u003e\nA: It is listed for compatible Audi C8 RS6 Avant and RS7 Sportback applications equipped with the EA825 4.0L twin-turbocharged V8.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit an Audi C8 RS6 Avant?\u003c\/strong\u003e\u003cbr\u003e\nA: The C8 RS6 Avant is included in the source listing. Verify the exact production year and factory exhaust configuration before ordering.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit an Audi C8 RS7 Sportback?\u003c\/strong\u003e\u003cbr\u003e\nA: The C8 RS7 Sportback is included in the source listing. Confirm the exhaust connection layout and mounting arrangement before purchase.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this fit every 2019-2023 RS6 and RS7?\u003c\/strong\u003e\u003cbr\u003e\nA: Not necessarily. The listed range is based on the supplied product information. Actual model-year availability and exhaust configurations vary by market.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this designed for the EA825 4.0T V8 engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. The supplied product information explicitly identifies the EA825 V8 4.0TT engine.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this exhaust have valves?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. The product name explicitly identifies a valved exhaust configuration.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does it include a remote controller?\u003c\/strong\u003e\u003cbr\u003e\nA: A remote controller is not confirmed in the supplied product information.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the factory exhaust valve actuators?\u003c\/strong\u003e\u003cbr\u003e\nA: Factory actuator compatibility is not confirmed. Please verify before ordering.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this a complete catback exhaust system?\u003c\/strong\u003e\u003cbr\u003e\nA: The source title identifies it as a catback exhaust, but the exact included pipe sections should be confirmed.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this made from stainless steel?\u003c\/strong\u003e\u003cbr\u003e\nA: The exact material and stainless steel grade are not explicitly confirmed in the supplied product description.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the exhaust pipe diameter?\u003c\/strong\u003e\u003cbr\u003e\nA: The exact pipe diameter has not been provided.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit an Audi C7 RS6 or RS7?\u003c\/strong\u003e\u003cbr\u003e\nA: Compatibility with C7 and C7.5 RS6\/RS7 applications is not confirmed.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this change the exhaust sound?\u003c\/strong\u003e\u003cbr\u003e\nA: An aftermarket valved exhaust may change exhaust tone and volume. Actual results depend on the complete vehicle setup.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this exhaust increase horsepower?\u003c\/strong\u003e\u003cbr\u003e\nA: No verified dyno data is supplied, so no specific horsepower or torque gain is claimed.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this require ECU tuning?\u003c\/strong\u003e\u003cbr\u003e\nA: A tuning requirement is not specified. Please verify based on the vehicle and existing modifications.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is professional installation recommended?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. Professional installation is recommended to ensure correct exhaust fitment, secure mounting, and proper valve operation.\n\u003c\/p\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eInstallation Note\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\nAllow the exhaust system to cool completely before beginning installation.\n\u003c\/p\u003e\n\n\u003cp\u003e\nSecurely raise and support the vehicle using appropriate lifting equipment and manufacturer-approved lifting points.\n\u003c\/p\u003e\n\n\u003cp\u003e\nInspect the factory exhaust system and verify that the KYOSTAR exhaust components match the intended vehicle's connection points and mounting locations.\n\u003c\/p\u003e\n\n\u003cp\u003e\nInstall the exhaust components using the appropriate hardware and procedures for the specific Audi model.\n\u003c\/p\u003e\n\n\u003cp\u003e\nIf the system uses exhaust valve actuators or electronic control components, verify their compatibility and installation requirements before connecting or operating the valve system.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBefore final tightening, confirm proper exhaust alignment, hanger positioning, and clearance from nearby underbody and rear bumper components.\n\u003c\/p\u003e\n\n\u003cp\u003e\nAfter installation, inspect all exhaust joints, mounting points, and valve components. Check for exhaust leaks, rattles, vibration, and interference.\n\u003c\/p\u003e\n\n\u003cp\u003e\nProfessional installation is recommended.\n\u003c\/p\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eWarranty \u0026amp; Shipping\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\nPlease review the applicable KYOSTAR warranty terms before purchasing. Warranty coverage, duration, and exclusions are subject to the policy in effect at the time of purchase.\n\u003c\/p\u003e\n\n\u003cp\u003e\nInspect the product upon delivery for visible shipping damage, missing components, or other concerns. Retain the original packaging and contact KYOSTAR customer support if an issue is identified.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBefore installation, verify that the received product matches SKU NA-CB-5108-SS-MB and your intended Audi C8 RS6 Avant or RS7 Sportback application.\n\u003c\/p\u003e\n\n\u003cp\u003e\nExhaust noise and modification regulations vary by location. Please confirm applicable local requirements before installation or road use.\n\u003c\/p\u003e\n\n\u003cp\u003e\nFor fitment assistance, valve-system questions, installation support, shipping information, or after-sales service, please contact KYOSTAR customer service.\n\u003c\/p\u003e\n\n\u003c\/div\u003e\n","brand":"KYOSTAR","offers":[{"title":"Ships from U.S. Warehouse","offer_id":67951218458897,"sku":"NA-CB-5108-SS-MB-4","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Ships from A.U. Warehouse","offer_id":67951218491665,"sku":"NA-CB-5108-SS-MB-1","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Ships from U.K. Warehouse","offer_id":67951218524433,"sku":"NA-CB-5108-SS-MB-2","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Ships from G.E. Warehouse","offer_id":67951218557201,"sku":"NA-CB-5108-SS-MB-3","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Factory Direct Shipping","offer_id":67951218589969,"sku":"NA-CB-5108-SS-MB-5","price":1150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/7361\/5889\/files\/NA-CB-5108-SS-MB_6.jpg?v=1793696967","url":"https:\/\/www.kyostars.com\/products\/kyostar-valved-sport-catback-exhaust-system-for-2019-2023-audi-c8-rs6-avant-rs7-sportback-ea825-4-0t-v8","provider":"KYOSTAR PERFORMANCE","version":"1.0","type":"link"}