BMW 216 Upgrade Fuel Injector for M57N - Genuine Bosch 13537793836Genuine Bosch M57N Solenoid Injector This is a BRAND NEW Genuine Bosch Injector, and does NOT require exchange. These injectors are a step up from the standard M57N injectors, without going to the really high flow 219's, consider them a nice compromise for a good tune without going to the extreme. This injector is often refered to as the 216, this is an upgrade higher flow injector that suits the M57N Cast Block. NOTE : Does NOT suit M57N2 Alloy Block