Borla ProXS Muffler; Center Dual; 2.5 in. Center Inlet; 2.5 in. Dual Borla Heavy Duty (Truck) Muffler 3in Center Center 24in x 6.75in Round (Notched) Borla Specialty Performance Mufflers T304 Stainless Steel Borla XR 1 Multi Core 3in Center Center 16in x 4.25in x 7.88in Oval Borla 40364 ProXS Muffler 2.5" Center Inlet Center Outlet Oval 14" x 4. Developed for truck applications and other applications that require a long body muffler. Notched necks for clamp on installation. Reversible design for installation flexibility. High quality T 304 austenitic stainless steel will never rust. 100% welded construction for strength. Free Flow design for improved performance. High temperature continuous filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation.