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Alternate muffler with Notched necks is 400479
Allows for addition and full customization of external oil cooler
Kit also comes complete with factory toe lock out washers to maintain desired settings
Borla Universal XR-1 Multi-Core Racing Muffler 3.5in Center-Center 14in x 6.25in Round - 401012 Wheel Spacers & Adapters /* Dark border for elementsXR 1(r) Multi Core Racing Muffler. 3. 5" Center Inlet 3. 5" Center Outlet 6. 25" Round x 14" Long Body 19. 75" Overall Length. Designed for applications where a 6. 25" round body can be used and will work on a wide range of vehicles. It features BORLA(r)'S patented Multi Core 4 tube design for maximum flow, horsepower, and torque. The Multi Core portion of XR 1(r) mufflers flows better than straight tubing. Recommend for high horsepower applications.
