This kit is intended for customers with tuned 2.0L TDI / BMW N47 cars who experience low rail faults ONLY.
A very small percentage of tuned cars will throw low rail faults at WOT in higher gears after the installation of the metering bypass kit. This custom socket and depth setting punch are a quick, easy, and accurate way to adjust your car's cascade valve and fix the low rail pressure issue. Please see the product instruction document linked below for a more in depth description of what this adjustment does.
