ProXS Muffler 3" Offset Inlet/ 3" Center Outlet, 4" x 9.5" Oval, 14" Long Body, 19" Overall Length. Notched necks for easy clamp-on installation using 1" wide band style clamps 18330 (clamps not included). Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel for superior corrosion resistance. 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. Alternate muffler with Un-Notched necks is 40359. If clamping, use 3" wide band clamps 18006. Best of all, it's made in the USA and backed by BORLA(r)'s Million-Mile warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.