Just got done putting in the new jet needle, currently I am running a .175 in the main.I think I can go higher but i'll have to tear off the gas tank and check the plug!!UUGGGGGHHH! If you guys are looking for some more power for your Pred this is definately the way to go. I took it out today for a test spin and it's like riding a whole new quad. The throttle response is almost too fast, making it rev harder. Now my predator gives out midrange power so similar to the Banshee, the dyno jet kit will make your pred feel more like a banshee in the top and a grunty raptor in the bottom. For just less than 50 bucks and 10% power gains this is definately worth it. I don't know how good the K&N jet kit compares to this one but it puts out massive power in the third gear to fith gear acceleration. I would have never believed that a simple needle change and higher jet would give this big of a response. If none of you have gotten a jet kit yet, and are looking forward to getting the edge over raptors than this will be the trick.