{"product_id":"kyostar-valved-catback-exhaust-system-for-2019-2025-bmw-f91-f92-f93-m8-s63-4-4l-twin-turbo-v8-performance-exhaust-kit","title":"KYOSTAR Valved Catback Exhaust System for 2019-2025 BMW F91 F92 F93 M8 S63 4.4L Twin Turbo V8 Performance Exhaust Kit","description":"\n\u003cdiv class=\"product-description\"\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eKYOSTAR Valved Catback Exhaust System for 2019-2025 BMW F91 F92 F93 M8 S63 4.4L Twin Turbo V8 Performance Exhaust Kit\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\n\u003cp\u003e\nUpgrade your BMW M8 with the KYOSTAR Valved Sport Catback Exhaust System. Designed for compatible 2019-2025 BMW F91, F92, and F93 M8 models equipped with the S63 4.4L twin-turbocharged V8 engine, this aftermarket exhaust system offers a performance-focused alternative to the factory center and rear exhaust assembly.\n\u003c\/p\u003e\n\n\u003cp\u003e\nFeaturing a valved exhaust configuration and vehicle-specific exhaust routing, the KYOSTAR Catback Exhaust System is intended for BMW enthusiasts who want to personalize their M8's exhaust character while maintaining a dedicated catback-style layout.\n\u003c\/p\u003e\n\n\u003cp\u003e\nWhether you're upgrading an M8 Coupe, M8 Convertible, or M8 Gran Coupe, this system provides a center and rear exhaust upgrade designed around the distinctive BMW M8 platform.\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 BMW M8 applications.\u003c\/li\u003e\n\u003cli\u003eDesigned for BMW S63 4.4L twin-turbocharged V8 engine applications.\u003c\/li\u003e\n\u003cli\u003eListed for BMW F91, F92, and F93 M8 models.\u003c\/li\u003e\n\u003cli\u003eValved exhaust configuration for a performance-oriented exhaust setup.\u003c\/li\u003e\n\u003cli\u003eCatback layout replaces the compatible center and rear exhaust sections.\u003c\/li\u003e\n\u003cli\u003ePerformance-inspired exhaust routing as shown in the product image.\u003c\/li\u003e\n\u003cli\u003eVehicle-specific exhaust configuration for the listed BMW M8 platform.\u003c\/li\u003e\n\u003cli\u003eDesigned for enthusiasts seeking a different exhaust tone and character.\u003c\/li\u003e\n\u003cli\u003eCenter and rear exhaust upgrade without replacing the factory downpipes.\u003c\/li\u003e\n\u003cli\u003eSilver-colored metal exhaust tubing appearance.\u003c\/li\u003e\n\u003cli\u003eSuitable for compatible BMW M8 street-performance builds.\u003c\/li\u003e\n\u003cli\u003eCatback-style exhaust assembly as shown in the product image.\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\u003eBMW M8 Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e2019-2025 BMW M8 Convertible (F91) — as applicable to production year and market.\u003c\/li\u003e\n\u003cli\u003e2019-2025 BMW M8 Coupe (F92) — as applicable to production year and market.\u003c\/li\u003e\n\u003cli\u003e2019-2025 BMW M8 Gran Coupe (F93) — as applicable to production year and market.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eEngine:\u003c\/strong\u003e BMW S63 4.4L Twin-Turbocharged V8\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExhaust Configuration:\u003c\/strong\u003e Valved Sport Catback Exhaust System\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 BMW M8 chassis, production year, engine configuration, and factory exhaust layout before ordering.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis product is listed for compatible BMW F91\/F92\/F93 M8 models equipped with the S63 4.4L twin-turbocharged V8 engine.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe source-listed 2019-2025 range should not be interpreted as confirmation that every M8 body style was available in every model year or market.\n\u003c\/p\u003e\n\n\u003cp\u003e\nCompatibility with BMW 840i, M850i, or other non-M8 BMW 8 Series configurations is not confirmed.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBefore purchase, verify the factory exhaust connection points, exhaust hangers, rear bumper outlet arrangement, valve components, and available underbody clearance.\n\u003c\/p\u003e\n\n\u003cp\u003e\nVehicles equipped with aftermarket downpipes, modified rear bumpers, or non-factory exhaust components may require additional fitment verification.\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 BMW M8 models equipped with the S63 twin-turbocharged V8 engine.\n\u003c\/p\u003e\n\n\u003cp\u003e\nA catback exhaust system replaces the exhaust sections downstream of the catalytic converter connection, typically including the center and rear exhaust components.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis product features a valved exhaust configuration. However, the exact valve actuation method, control module requirements, and compatibility with factory electronic valve controls are not specified in the supplied product information.\n\u003c\/p\u003e\n\n\u003cp\u003e\nA valved exhaust system can provide different exhaust characteristics depending on valve position and the installed control arrangement. Actual exhaust sound, volume, and valve behavior depend on the complete vehicle configuration.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBefore installation, compare the existing factory exhaust with the product images and verify the upstream connections, exhaust routing, hanger locations, valve connections, and rear outlet alignment.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe supplied specifications do not establish the exact pipe diameter, stainless steel grade, wall thickness, system weight, sound level, or tested horsepower and torque gains.\n\u003c\/p\u003e\n\n\u003cp\u003e\nNo specific numerical performance improvements are claimed without supporting vehicle-specific testing.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eProfessional installation is recommended.\u003c\/strong\u003e Confirm the valve-control requirements and included hardware before installation.\n\u003c\/p\u003e\n\n\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eProduct Details\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-5101-SS-MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eValved Sport Catback Exhaust System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Make\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Models\u003c\/td\u003e\n\u003ctd\u003eM8 Coupe \/ M8 Convertible \/ M8 Gran Coupe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis\u003c\/td\u003e\n\u003ctd\u003eF91 \/ F92 \/ F93\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed Model Years\u003c\/td\u003e\n\u003ctd\u003e2019-2025 (as applicable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine\u003c\/td\u003e\n\u003ctd\u003eS63 4.4L Twin-Turbo V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Type\u003c\/td\u003e\n\u003ctd\u003eCatback\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\u003eInstallation Area\u003c\/td\u003e\n\u003ctd\u003eCenter and Rear Exhaust Sections\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\u003eMaterial Grade\u003c\/td\u003e\n\u003ctd\u003eNot Specified\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003ePerformance Exhaust Upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Includes\u003c\/td\u003e\n\u003ctd\u003eCatback Exhaust Components as Shown; Exact Hardware and Valve Controls 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 BMW M8 exhaust system is engineered to balance everyday comfort, exhaust sound, emissions requirements, and the refined character of a high-performance grand touring vehicle.\n\u003c\/p\u003e\n\n\u003cp\u003e\nA performance catback exhaust changes the center and rear exhaust configuration, allowing enthusiasts to personalize the sound and appearance of their S63-powered BMW.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe KYOSTAR Valved Sport Catback Exhaust System is intended for drivers who want a performance-oriented exhaust layout with a valved configuration.\n\u003c\/p\u003e\n\n\u003cp\u003e\nActual exhaust tone, volume, and driving experience depend on the factory or aftermarket downpipes, valve operation, engine calibration, and other vehicle modifications.\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 BMW models does this exhaust fit?\u003c\/strong\u003e\u003cbr\u003e\nA: It is listed for compatible BMW F91\/F92\/F93 M8 applications equipped with the S63 4.4L twin-turbocharged V8 engine.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit a BMW F92 M8 Coupe?\u003c\/strong\u003e\u003cbr\u003e\nA: The F92 M8 Coupe is included in the listed applications. Please verify the production year and factory exhaust configuration.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit a BMW F91 M8 Convertible?\u003c\/strong\u003e\u003cbr\u003e\nA: The F91 M8 Convertible is included in the listed applications. Confirm the exact production year and exhaust layout before ordering.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit a BMW F93 M8 Gran Coupe?\u003c\/strong\u003e\u003cbr\u003e\nA: The F93 M8 Gran Coupe is included in the listed applications. Verify the vehicle's exhaust configuration before purchase.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this a complete catback exhaust system?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. The product is listed as a valved sport catback exhaust system for the compatible center and rear exhaust sections.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this exhaust have valves?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. The product is listed as a valved exhaust system.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I control the valves using the factory BMW settings?\u003c\/strong\u003e\u003cbr\u003e\nA: Factory valve-control compatibility is not specified. Please confirm the required control arrangement before ordering.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this exhaust include a remote control?\u003c\/strong\u003e\u003cbr\u003e\nA: A remote control is not confirmed in the supplied product information. Please verify the included valve-control accessories before purchase.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this make my BMW M8 louder?\u003c\/strong\u003e\u003cbr\u003e\nA: A performance catback exhaust may change exhaust volume and tone. Actual sound depends on the vehicle and valve configuration.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this replace the factory downpipes?\u003c\/strong\u003e\u003cbr\u003e\nA: No. A catback system replaces exhaust components downstream of the catalytic converter connection, not the factory downpipes.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit a BMW M850i?\u003c\/strong\u003e\u003cbr\u003e\nA: Compatibility with BMW M850i models is not confirmed.\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 provided, 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: An ECU tuning requirement is not specified. Please verify based on your vehicle and existing modifications.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this work with aftermarket downpipes?\u003c\/strong\u003e\u003cbr\u003e\nA: Compatibility depends on the connection dimensions and exhaust layout. Additional verification may be required.\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 proper alignment, valve operation, and secure mounting.\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 installation. Securely 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 center and rear exhaust sections and verify that the KYOSTAR catback assembly matches the intended mounting and connection locations.\n\u003c\/p\u003e\n\n\u003cp\u003e\nInstall the exhaust components using the appropriate hardware and installation procedures for the specific vehicle. Confirm valve-control requirements before connecting electrical or vacuum-operated components.\n\u003c\/p\u003e\n\n\u003cp\u003e\nAfter installation, inspect all exhaust joints, hangers, valve components, rear outlet alignment, and surrounding underbody clearance. Check for exhaust leaks, unwanted vibration, and interference before driving.\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 accessories, 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-5101-SS-MB and your intended BMW M8 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-control 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":67810364686609,"sku":"NA-CB-5101-SS-MB-1","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Ships from A.U. 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