Borla(r) 's CrateMuffler is the world's first muffler purpose-built to optimize the sound & power of crate and custom built motors. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap. This muffler is tuned for the Chevrolet LS3 6.2L V8 family. The directional design provides the aggressive ATAK(r) sound and will dramatically reduce or eliminate drone on specified applications. The muffler features Borla(r) 's Polyphonic Harmonizer Technology that utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean rich full-bodied sound. Muffler dimensions 3" Offset Inlet/ 3" Offset Outlet 6" x 10.34" Oval 14" Long Body 19" Overall Length. Built from premium T-304 stainless steel superior to T-400 series (such as 409) to give you the absolute best in performance and durability. Precision computer numerical control (CNC) manufacturing ensures an accurate fit and best of all Borla(r) stands behind every CrateMuffler with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.