{"product_id":"kyostar-valved-sport-catback-exhaust-system-for-2025-bmw-g90-g99-m5-s68-4-4t-v8","title":"KYOSTAR Valved Sport Catback Exhaust System for 2025+ BMW G90 G99 M5 S68 4.4T V8","description":"\u003ch5\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\n\u003cstrong\u003e\nKYOSTAR Valved Sport Catback Exhaust System for BMW G90 G99 M5 S68 4.4T Twin-Turbo V8 Engine\n\u003c\/strong\u003e\n\u003c\/span\u003e\n\u003c\/h5\u003e\n\n\u003cp\u003e\nThe KYOSTAR Valved Sport Catback Exhaust System is designed for 2025+ BMW G90 M5 and G99 M5 Touring models equipped with the S68 4.4T twin-turbo V8 engine. Developed as a high-performance exhaust upgrade, this system improves exhaust flow efficiency, enhances the aggressive V8 exhaust character, and provides adjustable sound control through an integrated valve system.\n\u003c\/p\u003e\n\n\u003cp\u003e\nManufactured from durable stainless steel with precision fabrication, the KYOSTAR valved catback exhaust system delivers improved exhaust performance, enhanced rear styling, and reliable operation under demanding driving conditions. The 4-tip performance design complements BMW M styling while allowing drivers to switch between a refined cruising tone and a more aggressive sport exhaust sound.\n\u003c\/p\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\nFeatures\n\u003c\/span\u003e\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\u003cp\u003e\nValved exhaust design provides adjustable sound control between comfortable cruising and aggressive performance modes.\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\nStainless steel construction offers excellent heat resistance, corrosion protection, and long-term durability.\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\nOptimized exhaust flow design helps reduce restriction and enhances the S68 twin-turbo V8 exhaust response.\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\n4-tip performance exhaust design improves rear appearance with a premium BMW M-inspired styling upgrade.\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\nDirect-fit catback system is engineered specifically for BMW G90 M5 and G99 M5 Touring applications.\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\nFitment\n\u003c\/span\u003e\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\u003cp\u003e\n2025+ BMW G90 M5\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\n2025+ BMW G99 M5 Touring\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\nNotes\n\u003c\/span\u003e\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eCompatible Vehicle:\u003c\/strong\u003e Designed for BMW G90 M5 and G99 M5 Touring models equipped with the S68 4.4T twin-turbo V8 engine.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eIncompatible Vehicle:\u003c\/strong\u003e Not compatible with BMW F90 M5, S63 engine platforms, or other non-G90\/G99 exhaust configurations.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eVerify Vehicle:\u003c\/strong\u003e Please confirm your vehicle Year, Chassis, Engine configuration, and factory exhaust system before ordering.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Professional installation is recommended to ensure correct exhaust alignment, valve operation, and proper sealing.\n\u003c\/p\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\nProduct Details\n\u003c\/span\u003e\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse;\" cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eKYOSTAR\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eNA-CB-5069-SS-WG-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\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\n\u003ctr\u003e\n\u003ctd\u003eVehicle Fitment\u003c\/td\u003e\n\u003ctd\u003eBMW G90 M5 \/ G99 M5 Touring\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eEngine\u003c\/td\u003e\n\u003ctd\u003eS68 4.4T Twin-Turbo V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eChassis\u003c\/td\u003e\n\u003ctd\u003eG90 \/ G99\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eBMW M Performance Exhaust Upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eBenefits\u003c\/td\u003e\n\u003ctd\u003eImproved Exhaust Flow, Adjustable Exhaust Tone, Enhanced V8 Sound, Reduced Exhaust Restriction\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eNatural Stainless Steel Finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003ePipe Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eValve Type\u003c\/td\u003e\n\u003ctd\u003eValved Exhaust System\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eExhaust Type\u003c\/td\u003e\n\u003ctd\u003eCatback Exhaust System\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eTip Style\u003c\/td\u003e\n\u003ctd\u003e4-Tip Performance Design\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eBolt-On Installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003ePackage Includes\u003c\/td\u003e\n\u003ctd\u003eComplete Catback Exhaust System, Valve Components, Installation Hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eBrand New\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/tbody\u003e\n\n\u003c\/table\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\nFAQ\n\u003c\/span\u003e\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\nQ1: Will this fit my vehicle?\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003cp\u003e\nThe KYOSTAR Valved Sport Catback Exhaust System is designed for 2025+ BMW G90 M5 and G99 M5 Touring models equipped with the S68 4.4T twin-turbo V8 engine. Please confirm your vehicle Year, Chassis, and Engine before purchase.\n\u003c\/p\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\nQ2: Does installation require modification?\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003cp\u003e\nThis catback exhaust system is designed for direct installation using factory-style mounting locations. Professional installation is recommended to ensure proper fitment and valve operation.\n\u003c\/p\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\nQ3: Does this require ECU tuning?\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003cp\u003e\nNo ECU tuning is required for this catback exhaust upgrade. Since the system is installed after the catalytic converter, it typically does not affect engine calibration or require additional tuning.\n\u003c\/p\u003e\n\n\u003ch5\u003e\n\u003cstrong\u003e\nQ4: What performance benefits does this provide?\n\u003c\/strong\u003e\n\u003c\/h5\u003e\n\n\u003cp\u003e\nThe KYOSTAR valved catback exhaust improves exhaust flow, enhances S68 V8 exhaust sound, provides adjustable volume control, and delivers a more engaging performance driving experience.\n\u003c\/p\u003e\n\n\u003cp\u003e\nProfessional installation is recommended.\n\u003c\/p\u003e\n\n\u003cp\u003e\nKYOSTAR products are quality inspected before shipment. Please contact our support team for installation assistance or after-sales support.\n\u003c\/p\u003e","brand":"KYOSTAR","offers":[{"title":"Ships from U.S. Warehouse","offer_id":53804308693265,"sku":"NA-CB-5069-SS-WG-1","price":1599.99,"currency_code":"USD","in_stock":false},{"title":"Factory Direct Shipping","offer_id":53804308726033,"sku":"NA-CB-5069-SS-WG-2","price":1579.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0919\/7361\/5889\/files\/NA-CB-5069-SS-WG_640x480_cae7e830-7dc4-4417-997b-11e8bb38f4c7.jpg?v=1784795297","url":"https:\/\/www.kyostars.com\/de\/products\/kyostar-valved-sport-catback-exhaust-system-for-2025-bmw-g90-g99-m5-s68-4-4t-v8","provider":"KYOSTAR PERFORMANCE","version":"1.0","type":"link"}