No I wont argue spring vs screw clamps, i see your points and you can use whatever you like. Theres plenty on my side but spring clamps are good as well, and as you said with the correct tool (which Ive never bothered to get) its probably much easier to install. But wow, you would keep on using the plastic tees when theres a billet option available ? Yes I do have the billet tees, love them, mine plastic tee broke and nearly destroyed my engine when all the coolant leaked out. Also stranded me overnight in the middle of Oklahoma waiting on the nearest dealer whic hwas 2 hours away to get the part, towing a horse trailer. Real fun. NEVER AGAIN. Its a smart preventative mtc measure. And yes Ive tried to find spring clamps to fit these, there arent any this thin (3/8" according to my ruler). All but the single wire spring clamps are too wide. The single wire spring clamps just dont provide enough clampging force. Dont think theres any difference between Dorman and OEM plastic either, Dorman makes most of the OEM stuff for GM, so its essentially the same shit chinese plastic tee just under a differnent name. I guess if you are going to keep on using plastic tees, replace them yearly and carry a spare in the glove box. It puts alot of stress on those heater core lines trying to unplug the "quick" disconnect fittings as well, so be very careful disturbing the hard metal lines going into heater core. If you break the plastic heater core, its pretty much game over. The truck is built around it. Maybe I just run my truck hotter and harder, towing alot. So maybe if you baby your truck and keep the temps underhood cool, your cheap chinese plastic parts last a little bit longer.