Basically for myself im an "OEM purist" keeping a machine maintained the way the factory/dealer prescribes should produce the best results? In regard to the gruven project, Top of the line metals ultra precise hand welded beautiful end product but requires hoses and clamps to "adapt" to OEM design? Also i lack the experience of sitting along the side of the 405 freeway with my wife and daughter in the car and steam coming out from under the hood only to discover it is the Plastic gm heater "Ts" that have failed. Or even worse the it is the heater "T" that i had replaced 6 months prior that has failed again! i have compared the dorman/oem "Ts" and the OEM is hands down the winner, i absolutely would not advise anyone to use that dorman china knockoff crap. if gruven wants my business, at least produce a small production run and get them out here for review to those that have paid so they can be evaluated for fit,install,function and overall value/piece of mind.