If you remove the ard head and plumbing youll need to weld in a bung in the exhaust to be able to include the exhaust temp sensor because without it the engine will derate. No other emission sensor is required. This also includes an iva delete but can be run plugged or unplugged. This file is around 600 hp and 2000 tq.I have several trucks that I have been running this file in for years now and its a great file. Includes instructions for settings in parameters plus Im always available for questions. The item "Cat Engine C15 SDP Emmision help" is in sale since Sunday, December 1, 2019. This item is in the category "eBay Motors\Parts & Accessories\Commercial Truck Parts\Engines & Components\Complete Engines". The seller is "colo1003" and is located in Arvada, Colorado. This item can be shipped worldwide.