This is a set of new 8 Bosch Design II 4 Hole Injectors 19Lb - 87 to 95. Direct Fit Upgrade For: 1987-1995 Porsche 928 S4, GT, GTS; 5.0L and 5.4L. They come with new O rings to fit the 928 Intake & Injector Rails. They clip to the rails like the originals and need no modification. Plug & Play. The original Injectors are Design I and no longer readily available. Design II is an iteration better than the original. Better flow and Fuel Atomization from the 4 hole spray pattern pintle cap. Injector Body Design: Stainless steel and composite plastic Static flow rate: 19lbs/hr. 216 cc/min at 43.5 psi O rings: Viton, upper-14.8 mm and lower-16.8 mm Resistance: 14.0 Ohms