{"product_id":"active-autowerke-signature-valved-catback-exhaust-g90-m5-g99-m5-touring","title":"Active Autowerke Signature Valved Catback Exhaust System - G90 M5 | G99 M5 Touring","description":"\u003cdiv id=\"tab-description\" class=\"tab-content\"\u003e\n\u003cdiv id=\"tab-description-mobile\" class=\"toggle-content show-mobile\"\u003e\n\u003cp\u003eBMW shipped the G90 M5 without exhaust valves. Active Autowerke put them back. The Signature Valved Catback System transforms how the S68 4.4L twin-turbo V8 sounds and breathes, delivering a deep, aggressive tone on demand without giving up daily drivability.\u003c\/p\u003e\n\u003cp\u003eThe system is built from mandrel-bent T304 stainless steel and TIG-welded end to end for durability and corrosion resistance. A high-flow X-pipe midsection sits at the center of the design, balancing exhaust pulses between banks for a fuller, more resonant tone. Piping runs 3.5” (89mm) from the downpipes back, reducing backpressure across the entire system while cutting roughly 10 to 12 lbs versus the OEM setup.\u003c\/p\u003e\n\u003cp\u003eRemote-controlled electronic valves give you full authority over the sound. Quiet and civil in Comfort, fully open and aggressive when you want it. Quad 112mm dual-wall tips finish the system in your choice of four finishes. Paired with catted downpipes, expect an estimated 18 to 22 hp and 20 to 25 lb-ft. Installation is a direct bolt-on with no cutting or welding, and the system is fully reversible to stock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRestores the exhaust valves BMW left off the G90 M5\u003c\/li\u003e\n\u003cli\u003eRemote-controlled electronic valve system, quiet in Comfort and aggressive when opened\u003c\/li\u003e\n\u003cli\u003eMandrel-bent T304 stainless steel, TIG-welded throughout\u003c\/li\u003e\n\u003cli\u003eHigh-flow X-pipe midsection balances pulses between banks\u003c\/li\u003e\n\u003cli\u003e3.5” (89mm) piping from downpipes to rear exhaust\u003c\/li\u003e\n\u003cli\u003eQuad 112mm dual-wall tips in four finishes\u003c\/li\u003e\n\u003cli\u003eApproximately 10 to 12 lbs lighter than the OEM system\u003c\/li\u003e\n\u003cli\u003eEstimated +18 to 22 hp and +20 to 25 lb-ft when paired with catted downpipes\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation, no cutting or welding\u003c\/li\u003e\n\u003cli\u003eFully reversible to stock\u003c\/li\u003e\n\u003cli\u003eMade in Miami, Florida\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBMW M5 (G90), 2025 and newer, and M5 Touring (G99)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Active Autowerke","offers":[{"title":"Brushed Tips","offer_id":51467825807606,"sku":"11-141","price":4274.05,"currency_code":"USD","in_stock":true},{"title":"Matte Black Tips","offer_id":51467825840374,"sku":"11-141B","price":4274.05,"currency_code":"USD","in_stock":true},{"title":"Carbon Tips","offer_id":51467825873142,"sku":"11-141C","price":4274.05,"currency_code":"USD","in_stock":true},{"title":"Carbon over Black Tips","offer_id":51467825905910,"sku":"11-141CB","price":4274.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2674\/6278\/files\/G90catbackrearc.jpg?v=1786749124","url":"https:\/\/autotecknic.com\/products\/active-autowerke-signature-valved-catback-exhaust-g90-m5-g99-m5-touring","provider":"AutoTecknic USA","version":"1.0","type":"link"}