I received my GYTR AIS kit today. As much as I hate to say this, I am very disappointed If I knew then what I know now, I would have just gotten the TT kit The plug components seem like 2nd grade quality. The best part seems to be the 48 pilot jet and shorter throttle stop. I am considering buying the TT kit as it sounds like the better quality plugs and will be the cleanest/neatest setup. Can anyone tell me if all 3 plugs are aluminum or only the inlet and exhaust plugs. Furthermore what temperatures do you think one gets in the head around the exhaust port where the plug seats? Will normal high temp RTV (up to 600deg F) be sufficient?