The SP Tools/Schley Products BMW Injector Line Socket Set, No. 13400, is designed for BMW’s with N54, N63 and S63 engines. With limited space in the engine compartment and injectors that are damaged easily, having the correct flair nut socket to work on fuel lines is critical. This set, which contains 14mm and 17mm sockets, works in these tight spaces allowing accurate torquing of the high pressure fuel lines. The open side allows more than 180-degree rotation, the sockets are thin enough to fit the injector with a wire loom attached and they are short enough to fit between the engine and fender well. Both the 14mm (No. 13420) and 17mm (No. 13410) sockets are available individually.