N54 coolant pipe relocation kit is used when converting to a single turbo setup. The factory coolant pipe which runs over the OEM turbos needs to be modified in order to run a single turbo setup. Instead of running straight off the motor our pipe hugs the block giving you as much room as you need for fabricating your own turbo setup. Kit comes with a CNC coolant pipe, OEM coolant hose, allen bolt kit, and hose clamps.