{"product_id":"borla-xr-1-multi-core-3in-ctr-ctr-oval-12in-x-4-25in-x-7-88in-rotary-engine-equipped-racing-muffler","title":"Borla XR-1 Multi-Core 3in Ctr-Ctr Oval 12in x 4.25in x 7.88in Rotary Engine Equipped Racing Muffler","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e400372\u003c\/span\u003e   |   \u003cstrong\u003eUPC:\u003c\/strong\u003e 808422003728\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eBorla 400372 XR-1 Multi-Core 3in Center Inlet\/Outlet Oval Racing Muffler for Mazda RX-7 1986-2002 \u0026amp; RX-8 2004-2011 Rotary Engines\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Borla 400372 XR-1 Multi-Core muffler is a compact, high-flow racing component designed for rotary engine vehicles like Mazda RX-7 and RX-8. This universal part features a reversible design with 3-inch center inlet and outlet for easy installation and maximum exhaust flow. It delivers increased power, torque, sharper throttle response, and the signature Borla aggressive exhaust note.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Multi-Core Design:\u003c\/strong\u003e Enhances exhaust scavenging for better power output and refined sound control in high-horsepower rotary applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-304 Stainless Steel Construction:\u003c\/strong\u003e Ensures lifelong durability with 100% welded build that resists corrosion and withstands extreme racing conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Oval Body:\u003c\/strong\u003e Measures 4.25in height x 7.88in width x 12in length (19in overall) to fit tight spaces on rotary-equipped vehicles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReversible Inlet\/Outlet:\u003c\/strong\u003e Allows flexible orientation for custom exhaust setups on Mazda RX-7 FC\/FD and RX-8 models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Temp CRF Acoustic Core:\u003c\/strong\u003e Manages sound levels while maintaining unrestricted flow for track-proven performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUniversal fit optimized for rotary engines; verify clearance before install.\u003c\/li\u003e\n\u003cli\u003eNo embossed logo for clean racing appearance.\u003c\/li\u003e\n\u003cli\u003eMade in the USA with precision engineering for motorsport reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eClamp-on 3in pipe connections; use stainless hardware for longevity.\u003c\/li\u003e\n\u003cli\u003eReversible design supports left\/right orientation; position for optimal ground clearance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1986-1991\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eRX-7\u003c\/td\u003e\n\u003ctd\u003eFC (All)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1993-2002\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eRX-7\u003c\/td\u003e\n\u003ctd\u003eFD (All, incl. 13B-REW)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2004-2011\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eRX-8\u003c\/td\u003e\n\u003ctd\u003e(All, incl. 13B-MSP Renesis)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose Borla?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDecades of leadership in stainless steel exhaust for street and racing.\u003c\/li\u003e\n\u003cli\u003eProven gains in power, torque, and fuel efficiency across applications.\u003c\/li\u003e\n\u003cli\u003eMillion-mile warranty on materials and workmanship for peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will this muffler fit my Mazda RX-7 or RX-8?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this universal XR-1 muffler is designed for 1986-2002 RX-7 FC\/FD and 2004-2011 RX-8 rotary engines with 3in piping; reversible for custom routing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material is the Borla 400372 made from?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e T-304 stainless steel with fully welded construction and high-temp fiber core for rust resistance and durability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Does Borla offer a warranty on this racing muffler?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Backed by Borla's million-mile warranty against defects in materials and craftsmanship when properly installed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground or FedEx\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Securely boxed for protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 8 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Borla","offers":[{"title":"Default Title","offer_id":41047443505231,"sku":"BOR400372","price":267.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/products\/borla-xr-1-multi-core-3in-ctr-ctr-oval-12in-x-4_25in-x-7_88in-rotary-engine-equipped-racing-muffler-borla.jpg?v=1765948371","url":"https:\/\/www.blackopsautoworks.com\/products\/borla-xr-1-multi-core-3in-ctr-ctr-oval-12in-x-4-25in-x-7-88in-rotary-engine-equipped-racing-muffler","provider":"Black Ops Auto Works","version":"1.0","type":"link"}