This Resonator is designed to dampen the sound of the BORLA Bronco 2.3L High Clearance Climber / Rock Crawler systems. It is NOT designed to work with competitors or Original Equipment (O.E.) systems. 2.75" diameter inlet and turn down outlet. Built from premium, high-quality T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, BORLA stands behind every direct fit resonator with a Million-Mile Warranty. Just what you‘d expect from the world‘s most experienced (and most winning) exhaust brand.