Based on general Delphi programming practices, if you are looking to work with

Flexible High-Pressure Hoses:

Specially reinforced hoses that allow the technician to connect to the fuel rail or pump while keeping the gauge at a safe viewing distance.

Delphi High-Performance Components: A Comprehensive Review

However, since Delphi is a primary supplier of high-performance fuel and engine management systems, the following is a draft review based on the engineering standards of their similar high-pressure and mechanical components.