Combine apricot preserves, seasoned rice vinegar and soy sauce in small saucepan.
Bring to boil and remove from heat.
Set aside to cool to room temperature.
Combine brown sugar, salt, Chinese five spice and pepper in small bowl.
Sprinkle and rub mixture evenly on surfaces of pork tenderloins.
Heat grill, grill pan or heavy skillet to medium high.
Grill tenderloin, uncovered, over direct heat for 15-20 minutes or until internal temperature reaches 145 degrees F., turning tenderloin over halfway through cooking.
Transfer pork to cutting board. Loosely cover with foil. Let rest for 5 minutes.
To serve, cut into 1/2-inch-thick slices and serve with sauce.