single cam or dual cam ka??? anyway, on the ka24e, the sr injectors dont git. iirc, the sr are side fed, and the ka24e are top feed. there is an injector thread on here somewhere. anyway, the ka24de are side feed, and the sr injectors work on that on. when i swapped out my orings for my injectors, i unbolted the fuel rail, and the injectors pretty much came out really easy, i dont see how you would have an issue with that, unless you didnt take out the fuel rail...