We have custom developed a -4 JIC converter for the upper water port for the VKLR turbos. Super convenient and allowing for the water return to be routed in any direction not just downwards as per the OEM Mercedes water pipe. 100% 360° installation by using a 90° or a 135° -4 JIC female end on your water hose.
Supplied complete with O ring and securing bracket and hardware.
(We can also supply as a 3/8" BSPT screw in fitting for the upper water union rather than our custom one, again converting to -4JIC male thread, and this would obviously require drilling/tapping to the water port)
Also available as a complete kit HERE including lower bolt on adapter plate with gasket.