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A high-quality wrench should be used to tighten the collar onto the fitting. The collar should be torqued to 37 lb-ft (slightly past hand tight), but not until after the other hose fitting has been attached and the assembly has been test-fitted on the vehicle. This way, the TechAFX “semi swivel” feature (see main text) will allow “clocking” of the fittings before finally torquing the fittings into position, for a more precise fit. And that’s it. The project is complete.