SRT4 sensor or turbo PT cruiser sensor from the auto parts. They are the same part. The 5.7 intake has to use an adaptor or just do what I did and T the hose off the back of the manifold and stick the sensor in a short hose and hose clamp it. Then you just leave the stock one in and plug the clip into the new one. Ive had no problems this way for 2 years.
Interesting the shop that did my install did just that, I thought that was weird, so no problems at all, no misfire codes or lean conditions?
Well I bought a 3bar that fits in the intake, Just need to get it calibrated by the shop.