The Sinister Diesel Regulated Fuel Return Kit is constructed of CNC machined billet aluminum parts and stainless steel braided fuel lines with nickel plated fittings. This kit comes with an adjustable regulator and fuel pressure gauge which allows the user to adjust pressure to keep a constant fuel pressure which will prolong the life of the injectors. This kit completely replaces the factory fuel filter bowl with the 10 Micron filter, allowing you to upgrade your system with high flow fuel lines (Filter to Engine) and a 6 micron canister style fuel filter that integrates right into your factory fuel lines that run the frame of your truck!!! The filter block mount utilizes a hinge system for easy fuel filter replacement while giving your engine a clean upgraded look. This system is a fully functional package and does not need any additional parts to work. 3/8″ inch quick disconnect tool is required for installation. Features: Construction – Billet Aluminum and Stainless Steel Product Design – CNC Precision Machined Performance Notes – Better Filtration Efficiency Kit Includes – Six Micron Fuel Filter, Sinister Fuel Filter Block, All New High Flow Fuel Lines, Adjustable Fuel Regulator, Oil Filled Fuel Pressure Gauge, Retaining Clips, Protective Cover For Braided Lines Fits 1999-2003 Ford Powerstroke 7.3L