Your Support is much Appreciated. Fuel Injection Pressure Regulator PR315. International Navistar DT466E DT466 Part numbers reference. PR315 PR218 2173337 F81Z-9C-968AA, F81Z-9C-968AB. F81Z9C968AA, F81Z9C968AB F5TZ9C968A (1841217C91) 1841217C91. Track Page Views With. Auctiva’s FREE Counter.