aFe Power 42-12031 DFS780 Series Diesel Fuel System (Non-CARB Compliant) Clear high-impact polycarbonate sight glass for visual inspection of fuel Can be run independently or in parallel with the stock fuel pump Helical Spur Gears runs quieter than straight cut gears Contoured CNC manifold enhances flow This product is not CARB exempt at this time and is not legal for sale in California or use on vehicles registered with the California Department of Motor Vehicles 187 GPH at 18-20 psi Flow Rating