This set of (8) 190/75% 6.0L fuel injectors are custom built by Renegade Diesel. Starting with new Ford Motorcraft injectors, we modify the injector internals for increased displacement (55cc over stock). This injector uses a 75% over stock EDM nozzle for increased performance. Some adjustment to your "day to day" driving style will be required. This is a "Hot Street" injector, and as such, we do recommend that you use a high quality tune. For tuning options please give us a call!