What year is your Jeep? For all Jeeps before 99 then you need the 0280155703 injectors from 95-97 2.0L. You can also find the injectors from other Dodge/Chrysler vehicles with the same motor or the 2.4L engine. I found mine in a Neon and a Chrysler Cirrus and my Cousin's I got from a Neon and a Grand Caravan. If you have a 99 1/2ish Jeep then you have a different connector style for the injectors and need the 0280155784 from a 98-? of the same vehicles and motors listed above. I had a very hard time hunting down the right injectors as even the right year range and motor Neons had a different injector that wasn't the right ones.
A lot of guys have done the Neon injector upgrade with absolutely great results. Some guys like to say they are too much for the 4.0L which may be closer to being true and a bone stock motor but on a 4.0L that has some performance upgrades that get more air to motor then this argument becomes debatable. My MPG numbers improvement don't lie. This was a great upgrade for me so I say go for it!