240D - One Injector is Different

[treiberg]

My '81 240D appears to have one injector different than the rest (see pic). You can see the difference in the bodies, although the overal height is the same. The different injector is a bosch injector, which I think was an original on these cars. Does anyone recognize the other three? They say NA30X on the injector. Are these some aftermarket ones?

The bodies of the NA30X injectors all unscrewed with some application of torque. That Bosch one will not come apart. I actually ruined a breaker bar trying to get it apart. I may just have buy a new injector.

The reason I am doing this job was to install new Monark nozzles. Bought a pop tester and having lots of fun!