This is a necessary mechanical modification to fuel injection system.  The fuel injectors based their power output levels and displacement on stock configurations.  (currently a 130HP 2.8L engine).  When the rebuild is complete, a 3.2L 210-230HP motor will be starved with minimal flow.  The ECM (Electronic Control Module) assumes that the injectors will normally be operating near the middle of their potential range.  Maximum output for these injectors are available only under WOT.  Buying newer high flow injectors will set you back $5--$6 bills.  Stock injectors must then be tricked into flowing more gas.  This is the job of high-fuel regulator.  The ECM is happy, the engine is happy and most of all, you didn't shell out $600 bucks!  You can save that for your Hypertech/Stat and a box o' chocolates for someone special. :)