You've got a serious build and need to attach a factory Mk3 or Mk4 fuel pressure regulator to your high-flow fuel rail? Here's a superior solution. Our compact and high-flow adapter features -6AN threads, o-ring seals, and machined-in fuel return line fitting. Other fittings are supplied as pictured. This Genesis piece allows for feed and return to be on the same rail side or on either end. A third port is also set up for a 1/8" NPT fuel pressure gauge (making an inline gauge adapter unnecessary). Or, for truly massive flow and pressure, a third pump may be attached to it.
Note: Pressure regulator and gauge available separately.