[Vehicle Fitment]: Compatible with Freightliner Cascadia/Columbia/Coronado/XC Modular Rail/XC Raised Rail; Compatible with Kenworth C500/T660/T680/T700/T800/T880/W900; Compatible with Peterbilt 320/365/367/384/386/388/389/567/587; Compatible with Pierce Mfg. Inc. Arrow XT/Velocity; Compatible with Volvo VNL; Compatible with Western Star 4900EX/4900FA/4900SA/6900XD---12V; Engine Outlet. [Direct Replacement]: Quick and easy installation; Perfect match for the original vehicles. [Restores performance]: Repair nitrogen oxide detection properly to keeping the vehicle in compliance. [Specifications]: Reference Number: 904-6006, 9046006, 5WK96753A, 5WK9 6753B, 1954665PE, 1954665PRX, 2872947NX, 4326869; Connector: 4 Pins; Location: Upstream.
