better to get aftermarket injectors,take the top of the inlet manifold off first theres bolts in there you have to take off first then take the inlet manifold off with the fuel rails, making sure you unclip, unplug everythink first ie,fuel lines accelerator cables, injector clips, and make sure you know where everythink goes, then pull out the injectors one by one making sure you get the rubbers out with them. then reverse it to put it back togetha, it took me about 2hours to replace my injectors.
VS Series 3 5spd ute, with a worked v6 ecotec