2011-2016 GM HD Fuel Filter Mount Spacer Kit (113059420)Description Make fuel filter changes easier with the PPE Fuel Filter Mount Spacer Kit. From the factory, the lack of clearance around the fuel filter makes it very difficult to get a tool around the fuel filter for servicing. Save time and make routine fuel filter servicing easier with the PPE Fuel Filter Mount Spacer Kit. Features 11 16 GM 6. 6L Duramax Fuel Filter Mount Spacer Kit CNC machined billet aluminum No modifications required, quick and