Includes Hybrid models. Will NOT fit with optional bed step. This 2.5 in. diameter Cat-Back system features a True Dual design with two full tail pipes (Not just a single tail pipe with dual tips) that is unique in the industry. It was designed specifically for the Tundra 3.4L and delivers the classic S-Type sound without any drone. The system features a Merge X-Pipe for increased performance and improved sound. The system is finished off with single 4.5 in. round bright chrome on T-304 stainless steel tips on each tail pipe. Systems with black chrome on T-304 stainless steel tips, and carbon fiber with black anodized center tips are also available. Add Extension Pipes 60734 for Crew Cab with Standard Bed (6' 6 in.) 157.7 in. Wheelbase vehicles. Add Extension Pipes 60735 for Extended Cab with Long Bed (6' 1 in.) 164.6 in. Wheelbase Vehicles. It is built with premium, high-quality austenitic T-304 stainless steel for a sharp appearance and long life. Our computer numerical control (CNC) manufacturing techniques ensures accurate fit and maximum performance. Mandrel bends ensure maximum flow & power.