for hoses i like to use electrical shrink wrap.
comes in all different colors and sizes.
slip a piece of solder inside (making sure the tube is longer than the solder)
bend to shape, heat lightly with heat source of your choice
trim the ends maybe a dab of ca to seal it up
and you can use smaller sizes for heater, p/s and ac hoses.
you can also make duct couplers for cold air intakes and brake ducts.
just cut to length and heat lightly.